diff --git a/polymer/eduke32/source/actors.c b/polymer/eduke32/source/actors.c
index 13e966276..d451298e7 100644
--- a/polymer/eduke32/source/actors.c
+++ b/polymer/eduke32/source/actors.c
@@ -360,16 +360,16 @@ int32_t A_MoveSprite(int32_t spritenum, const vec3_t *change, uint32_t cliptype)
 
         if (dasectnum < 0 || (dasectnum >= 0 &&
                               ((actor[spritenum].actorstayput >= 0 && actor[spritenum].actorstayput != dasectnum) ||
-                               ((spr->picnum == BOSS2) && spr->pal == 0 && sector[dasectnum].lotag != 3) ||
-                               ((spr->picnum == BOSS1 || spr->picnum == BOSS2) && sector[dasectnum].lotag == 1) /*||
-                               (sector[dasectnum].lotag == 1 && (spr->picnum == LIZMAN || (spr->picnum == LIZTROOP && spr->zvel == 0)))*/
+                               ((spr->picnum == BOSS2) && spr->pal == 0 && sector[dasectnum].lotag != ST_3) ||
+                               ((spr->picnum == BOSS1 || spr->picnum == BOSS2) && sector[dasectnum].lotag == ST_1_ABOVE_WATER) /*||
+                               (sector[dasectnum].lotag == ST_1_ABOVE_WATER && (spr->picnum == LIZMAN || (spr->picnum == LIZTROOP && spr->zvel == 0)))*/
                               ))
            )
         {
             spr->x = oldx;
             spr->y = oldy;
             /*
-            if (dasectnum >= 0 && sector[dasectnum].lotag == 1 && spr->picnum == LIZMAN)
+            if (dasectnum >= 0 && sector[dasectnum].lotag == ST_1_ABOVE_WATER && spr->picnum == LIZMAN)
             spr->ang = (krand()&2047);
             else if ((Actor[spritenum].t_data[0]&3) == 1 && spr->picnum != COMMANDER)
             spr->ang = (krand()&2047);
@@ -438,7 +438,7 @@ int32_t A_MoveSprite(int32_t spritenum, const vec3_t *change, uint32_t cliptype)
                 {
                     switch (sector[dasectnum].lotag)
                     {
-                    case 1:
+                    case ST_1_ABOVE_WATER:
                         if (daz >= actor[spritenum].floorz)
                         {
                             if (totalclock > actor[spritenum].lasttransport)
@@ -455,7 +455,7 @@ int32_t A_MoveSprite(int32_t spritenum, const vec3_t *change, uint32_t cliptype)
 
                             return 0;
                         }
-                    case 2:
+                    case ST_2_UNDERWATER:
                         if (daz <= actor[spritenum].ceilingz)
                         {
                             if (totalclock > actor[spritenum].lasttransport)
@@ -1024,14 +1024,14 @@ void A_MoveDummyPlayers(void)
 
         psectnum = ps->cursectnum;
 
-        if (ps->on_crane >= 0 || (psectnum >= 0 && sector[psectnum].lotag != 1) || sprite[ps->i].extra <= 0)
+        if (ps->on_crane >= 0 || (psectnum >= 0 && sector[psectnum].lotag != ST_1_ABOVE_WATER) || sprite[ps->i].extra <= 0)
         {
             ps->dummyplayersprite = -1;
             KILLIT(i);
         }
         else
         {
-            if (ps->on_ground && ps->on_warping_sector == 1 && psectnum >= 0 && sector[psectnum].lotag == 1)
+            if (ps->on_ground && ps->on_warping_sector == 1 && psectnum >= 0 && sector[psectnum].lotag == ST_1_ABOVE_WATER)
             {
                 CS = 257;
                 SZ = sector[SECT].ceilingz+(27<<8);
@@ -1042,7 +1042,7 @@ void A_MoveDummyPlayers(void)
             }
             else
             {
-                if (sector[SECT].lotag != 2) SZ = sector[SECT].floorz;
+                if (sector[SECT].lotag != ST_2_UNDERWATER) SZ = sector[SECT].floorz;
                 CS = (int16_t) 32768;
             }
         }
@@ -1072,7 +1072,7 @@ ACTOR_STATIC void G_MovePlayers(void)
     {
         const int32_t nexti = nextspritestat[i];
 
-        spritetype *s = &sprite[i];
+        spritetype *const s = &sprite[i];
         DukePlayer_t *const p = g_player[s->yvel].ps;
 
         if (s->owner >= 0)
@@ -1193,9 +1193,9 @@ ACTOR_STATIC void G_MovePlayers(void)
             else
             {
                 s->yrepeat = 36;
-                if (sector[s->sectnum].lotag != 2)
+                if (sector[s->sectnum].lotag != ST_2_UNDERWATER)
                     A_Fall(i);
-                if (s->zvel == 0 && sector[s->sectnum].lotag == 1)
+                if (s->zvel == 0 && sector[s->sectnum].lotag == ST_1_ABOVE_WATER)
                     s->z += (32<<8);
             }
 
@@ -2597,7 +2597,7 @@ ACTOR_STATIC void G_MoveWeapons(void)
                     k = s->xvel;
                     ll = s->zvel;
 
-                    if (sector[s->sectnum].lotag == 2)
+                    if (sector[s->sectnum].lotag == ST_2_UNDERWATER)
                     {
                         k >>= 1;
                         ll >>= 1;
@@ -2645,16 +2645,16 @@ ACTOR_STATIC void G_MoveWeapons(void)
                         j = 16384|(s->sectnum);
                         s->zvel = -1;
                     }
-                    else if ((s->z > actor[i].floorz && sector[s->sectnum].lotag != 1) ||
-                        (s->z > actor[i].floorz+(16<<8) && sector[s->sectnum].lotag == 1))
+                    else if ((s->z > actor[i].floorz && sector[s->sectnum].lotag != ST_1_ABOVE_WATER) ||
+                        (s->z > actor[i].floorz+(16<<8) && sector[s->sectnum].lotag == ST_1_ABOVE_WATER))
                     {
                         j = 16384|(s->sectnum);
-                        if (sector[s->sectnum].lotag != 1)
+                        if (sector[s->sectnum].lotag != ST_1_ABOVE_WATER)
                             s->zvel = 1;
                     }
                 }
 
-                if (proj->workslike & PROJECTILE_WATERBUBBLES && sector[s->sectnum].lotag == 2 && rnd(140))
+                if (proj->workslike & PROJECTILE_WATERBUBBLES && sector[s->sectnum].lotag == ST_2_UNDERWATER && rnd(140))
                     A_Spawn(i,WATERBUBBLE);
 
                 if (j != 0)
@@ -2878,7 +2878,7 @@ ACTOR_STATIC void G_MoveWeapons(void)
             k = s->xvel;
             ll = s->zvel;
 
-            if (s->picnum == RPG && sector[s->sectnum].lotag == 2)
+            if (s->picnum == RPG && sector[s->sectnum].lotag == ST_2_UNDERWATER)
             {
                 k >>= 1;
                 ll >>= 1;
@@ -2892,7 +2892,7 @@ ACTOR_STATIC void G_MoveWeapons(void)
             {
             case RPG__STATIC:
                 if (DYNAMICTILEMAP(s->picnum) == RPG__STATIC && actor[i].picnum != BOSS2 &&
-                    s->xrepeat >= 10 && sector[s->sectnum].lotag != 2)
+                    s->xrepeat >= 10 && sector[s->sectnum].lotag != ST_2_UNDERWATER)
                 {
                     j = A_Spawn(i,SMALLSMOKE);
                     sprite[j].z += (1<<8);
@@ -2927,11 +2927,11 @@ ACTOR_STATIC void G_MoveWeapons(void)
                         j = 16384|(s->sectnum);
                         s->zvel = -1;
                     }
-                    else if ((s->z > actor[i].floorz && sector[s->sectnum].lotag != 1) ||
-                        (s->z > actor[i].floorz+(16<<8) && sector[s->sectnum].lotag == 1))
+                    else if ((s->z > actor[i].floorz && sector[s->sectnum].lotag != ST_1_ABOVE_WATER) ||
+                        (s->z > actor[i].floorz+(16<<8) && sector[s->sectnum].lotag == ST_1_ABOVE_WATER))
                     {
                         j = 16384|(s->sectnum);
-                        if (sector[s->sectnum].lotag != 1)
+                        if (sector[s->sectnum].lotag != ST_1_ABOVE_WATER)
                             s->zvel = 1;
                     }
                 }
@@ -3120,7 +3120,7 @@ COOLEXPLOSION:
                     if (s->shade >= 40)
                         KILLIT(i);
                 }
-                else if (s->picnum == RPG && sector[s->sectnum].lotag == 2 && s->xrepeat >= 10 && rnd(140))
+                else if (s->picnum == RPG && sector[s->sectnum].lotag == ST_2_UNDERWATER && s->xrepeat >= 10 && rnd(140))
                     A_Spawn(i,WATERBUBBLE);
 
                 goto BOLT;
@@ -3309,7 +3309,7 @@ ACTOR_STATIC void G_MoveTransports(void)
                             break;
                         }
                     }
-                    else if (!(sectlotag == 1 && ps->on_ground == 1)) break;
+                    else if (!(sectlotag == ST_1_ABOVE_WATER && ps->on_ground == 1)) break;
 
                     if (onfloorz == 0 && klabs(SZ-ps->pos.z) < 6144)
                         if ((ps->jetpack_on == 0) || (ps->jetpack_on && TEST_SYNC_KEY(g_player[p].sync->bits, SK_JUMP)) ||
@@ -3404,24 +3404,24 @@ ACTOR_STATIC void G_MoveTransports(void)
                         case TOILETWATER__STATIC:
                         case LASERLINE__STATIC:
                             goto JBOLT;
+
                         case PLAYERONWATER__STATIC:
-                            if (sectlotag == 2)
+                            if (sectlotag == ST_2_UNDERWATER)
                             {
                                 sprite[j].cstat &= 32768;
                                 break;
                             }
                         default:
-                            if (sprite[j].statnum == STAT_MISC && !(sectlotag == 1 || sectlotag == 2))
+                            if (sprite[j].statnum == STAT_MISC && !(sectlotag == ST_1_ABOVE_WATER || sectlotag == ST_2_UNDERWATER))
                                 break;
-
                         case WATERBUBBLE__STATIC:
-                            //                                if( rnd(192) && sprite[j].picnum == WATERBUBBLE)
-                            //                                 break;
+//                            if( rnd(192) && sprite[j].picnum == WATERBUBBLE)
+//                                break;
 
                             if (sectlotag > 0)
                             {
                                 k = A_Spawn(j,WATERSPLASH2);
-                                if (sectlotag == 1 && sprite[j].statnum == STAT_PROJECTILE)
+                                if (sectlotag == ST_1_ABOVE_WATER && sprite[j].statnum == STAT_PROJECTILE)
                                 {
                                     sprite[k].xvel = sprite[j].xvel>>1;
                                     sprite[k].ang = sprite[j].ang;
@@ -4459,16 +4459,16 @@ ACTOR_STATIC void G_MoveActors(void)
             {
                 A_Fall(i);
 
-                if ((sector[sect].lotag != 1 || actor[i].floorz != sector[sect].floorz) && s->z >= actor[i].floorz-(ZOFFSET) && s->yvel < 3)
+                if ((sector[sect].lotag != ST_1_ABOVE_WATER || actor[i].floorz != sector[sect].floorz) && s->z >= actor[i].floorz-(ZOFFSET) && s->yvel < 3)
                 {
                     if (s->yvel > 0 || (s->yvel == 0 && actor[i].floorz == sector[sect].floorz))
                         A_PlaySound(PIPEBOMB_BOUNCE,i);
                     s->zvel = -((4-s->yvel)<<8);
-                    if (sector[s->sectnum].lotag== 2)
+                    if (sector[s->sectnum].lotag == ST_2_UNDERWATER)
                         s->zvel >>= 2;
                     s->yvel++;
                 }
-                if (s->z < actor[i].ceilingz)   // && sector[sect].lotag != 2 )
+                if (s->z < actor[i].ceilingz)   // && sector[sect].lotag != ST_2_UNDERWATER )
                 {
                     s->z = actor[i].ceilingz+(3<<8);
                     s->zvel = 0;
@@ -4486,7 +4486,7 @@ ACTOR_STATIC void G_MoveActors(void)
 
             actor[i].movflag = j;
 
-            if (sector[SECT].lotag == 1 && s->zvel == 0 && actor[i].floorz == sector[sect].floorz)
+            if (sector[SECT].lotag == ST_1_ABOVE_WATER && s->zvel == 0 && actor[i].floorz == sector[sect].floorz)
             {
                 s->z += (32<<8);
                 if (t[5] == 0)
@@ -4513,7 +4513,7 @@ ACTOR_STATIC void G_MoveActors(void)
             if (s->xvel > 0)
             {
                 s->xvel -= 5;
-                if (sector[sect].lotag == 2)
+                if (sector[sect].lotag == ST_2_UNDERWATER)
                     s->xvel -= 10;
 
                 if (s->xvel < 0)
@@ -5004,7 +5004,7 @@ ACTOR_STATIC void G_MoveMisc(void)  // STATNUM 5
                 t[0]++;
                 if (t[0] == 1)
                 {
-                    if (sector[sect].lotag != 1 && sector[sect].lotag != 2)
+                    if (sector[sect].lotag != ST_1_ABOVE_WATER && sector[sect].lotag != ST_2_UNDERWATER)
                         KILLIT(i);
                     /*
                     else
@@ -5074,7 +5074,7 @@ ACTOR_STATIC void G_MoveMisc(void)  // STATNUM 5
                 T1 += (krand()&63);
                 if ((T1&2047) > 512 && (T1&2047) < 1596)
                 {
-                    if (sector[sect].lotag == 2)
+                    if (sector[sect].lotag == ST_2_UNDERWATER)
                     {
                         if (s->zvel < 64)
                             s->zvel += (g_spriteGravity>>5)+(krand()&7);
@@ -5148,7 +5148,7 @@ ACTOR_STATIC void G_MoveMisc(void)  // STATNUM 5
                 if (s->z < l-(2<<8))
                 {
                     if (t[1] < 2) t[1]++;
-                    else if (sector[sect].lotag != 2)
+                    else if (sector[sect].lotag != ST_2_UNDERWATER)
                     {
                         t[1] = 0;
                         if (s->picnum == DUKELEG || s->picnum == DUKETORSO || s->picnum == DUKEGUN)
@@ -5166,7 +5166,7 @@ ACTOR_STATIC void G_MoveMisc(void)  // STATNUM 5
 
                     if (s->zvel < 6144)
                     {
-                        if (sector[sect].lotag == 2)
+                        if (sector[sect].lotag == ST_2_UNDERWATER)
                         {
                             if (s->zvel < 1024)
                                 s->zvel += 48;
@@ -5326,7 +5326,7 @@ ACTOR_STATIC void G_MoveMisc(void)  // STATNUM 5
                 if (sect < 0 || (sector[sect].floorz + 256) < s->z)
                     KILLIT(i);
 
-                if (sector[sect].lotag == 2)
+                if (sector[sect].lotag == ST_2_UNDERWATER)
                 {
                     t[1]++;
                     if (t[1] > 8)
@@ -5371,7 +5371,7 @@ ACTOR_STATIC void G_MoveMisc(void)  // STATNUM 5
                 if (s->z == actor[i].floorz-(ZOFFSET) && t[0] < 3)
                 {
                     s->zvel = -((3-t[0])<<8)-(krand()&511);
-                    if (sector[sect].lotag == 2)
+                    if (sector[sect].lotag == ST_2_UNDERWATER)
                         s->zvel >>= 1;
                     s->xrepeat >>= 1;
                     s->yrepeat >>= 1;
@@ -5887,7 +5887,7 @@ ACTOR_STATIC void G_MoveEffectors(void)   //STATNUM 3
                         break;
                     }
 
-                    if (sector[ps->cursectnum].lotag != 2)
+                    if (sector[ps->cursectnum].lotag != ST_2_UNDERWATER)
                     {
                         if (g_playerSpawnPoints[p].os == s->sectnum)
                         {
@@ -5929,7 +5929,7 @@ ACTOR_STATIC void G_MoveEffectors(void)   //STATNUM 3
                 j = headspritesect[s->sectnum];
                 while (j >= 0)
                 {
-                    if (sprite[j].statnum != STAT_PLAYER && sector[sprite[j].sectnum].lotag != 2 &&
+                    if (sprite[j].statnum != STAT_PLAYER && sector[sprite[j].sectnum].lotag != ST_2_UNDERWATER &&
                             (sprite[j].picnum != SECTOREFFECTOR || (sprite[j].lotag == SE_49_POINT_LIGHT||sprite[j].lotag == SE_50_SPOT_LIGHT))
                             && sprite[j].picnum != LOCATORS)
                     {
@@ -5984,7 +5984,7 @@ ACTOR_STATIC void G_MoveEffectors(void)   //STATNUM 3
                 for (j=headspritesect[s->sectnum]; j >= 0; j=nextspritesect[j])
                 {
                     // keep this conditional in sync with above!
-                    if (sprite[j].statnum != STAT_PLAYER && sector[sprite[j].sectnum].lotag != 2 &&
+                    if (sprite[j].statnum != STAT_PLAYER && sector[sprite[j].sectnum].lotag != ST_2_UNDERWATER &&
                             (sprite[j].picnum != SECTOREFFECTOR || (sprite[j].lotag == SE_49_POINT_LIGHT||sprite[j].lotag == SE_50_SPOT_LIGHT))
                             && sprite[j].picnum != LOCATORS)
                     {
diff --git a/polymer/eduke32/source/game.c b/polymer/eduke32/source/game.c
index 5403b2e38..e9aaeed0c 100644
--- a/polymer/eduke32/source/game.c
+++ b/polymer/eduke32/source/game.c
@@ -4230,12 +4230,12 @@ int32_t A_Spawn(int32_t j, int32_t pn)
             sp->cstat |= 128;
             if (j >= 0)
             {
-                if (sector[sprite[j].sectnum].lotag == 2)
+                if (sector[sprite[j].sectnum].lotag == ST_2_UNDERWATER)
                 {
                     sp->z = getceilzofslope(SECT,SX,SY)+(16<<8);
                     sp->cstat |= 8;
                 }
-                else if (sector[sprite[j].sectnum].lotag == 1)
+                else if (sector[sprite[j].sectnum].lotag == ST_1_ABOVE_WATER)
                     sp->z = getflorzofslope(SECT,SX,SY);
             }
 
@@ -4417,7 +4417,7 @@ int32_t A_Spawn(int32_t j, int32_t pn)
 
         }
 
-        if (sector[SECT].lotag == 1)
+        if (sector[SECT].lotag == ST_1_ABOVE_WATER)
         {
             changespritestat(i, STAT_MISC);
             break;
@@ -4638,7 +4638,7 @@ int32_t A_Spawn(int32_t j, int32_t pn)
             }
 
             sp->z = sector[sect].floorz;
-            if (sector[sect].lotag != 1 && sector[sect].lotag != 2)
+            if (sector[sect].lotag != ST_1_ABOVE_WATER && sector[sect].lotag != ST_2_UNDERWATER)
                 sp->xrepeat = sp->yrepeat = 32;
 
             A_AddToDeleteQueue(i);
@@ -4852,7 +4852,7 @@ int32_t A_Spawn(int32_t j, int32_t pn)
                 sp->xrepeat = sprite[j].xrepeat;
                 sp->yrepeat = sprite[j].yrepeat;
                 sp->zvel = 128;
-                if (sector[sp->sectnum].lotag != 2)
+                if (sector[sp->sectnum].lotag != ST_2_UNDERWATER)
                     sp->cstat |= 32768;
             }
             changespritestat(i, STAT_DUMMYPLAYER);
@@ -4962,7 +4962,7 @@ int32_t A_Spawn(int32_t j, int32_t pn)
             break;
         case TOUCHPLATE__STATIC:
             T3 = sector[sect].floorz;
-            if (sector[sect].lotag != 1 && sector[sect].lotag != 2)
+            if (sector[sect].lotag != ST_1_ABOVE_WATER && sector[sect].lotag != ST_2_UNDERWATER)
                 sector[sect].floorz = sp->z;
             if (sp->pal && (g_netServer || ud.multimode > 1))
             {
@@ -5374,8 +5374,8 @@ int32_t A_Spawn(int32_t j, int32_t pn)
             case 46:
                 ror_protectedsectors[sp->sectnum] = 1;
                 /* XXX: fall-through intended? */
-            case 49:
-            case 50:
+            case SE_49_POINT_LIGHT:
+            case SE_50_SPOT_LIGHT:
             {
                 int32_t j, nextj;
 
@@ -5872,7 +5872,7 @@ int32_t A_Spawn(int32_t j, int32_t pn)
 
                     sp->shade = 0;
                 }
-                else if (sp->lotag == 2)
+                else if (sp->lotag == SE_2_EARTHQUAKE)
                 {
                     T6 = sector[sp->sectnum].floorheinum;
                     sector[sp->sectnum].floorheinum = 0;
@@ -6571,7 +6571,7 @@ void G_DoSpriteAnimations(int32_t ourx, int32_t oury, int32_t oura, int32_t smoo
 #endif
                     k = getofs_viewtype5(s, t, oura);
 
-                if (sector[s->sectnum].lotag == 2) k += 1795-1405;
+                if (sector[s->sectnum].lotag == ST_2_UNDERWATER) k += 1795-1405;
                 else if ((actor[i].floorz-s->z) > (64<<8)) k += 60;
 
                 t->picnum += k;
@@ -6580,7 +6580,7 @@ void G_DoSpriteAnimations(int32_t ourx, int32_t oury, int32_t oura, int32_t smoo
                 goto PALONLY;
             }
 
-            if (g_player[p].ps->on_crane == -1 && (sector[s->sectnum].lotag&0x7ff) != 1)
+            if (g_player[p].ps->on_crane == -1 && (sector[s->sectnum].lotag&0x7ff) != 1)  // ST_1_ABOVE_WATER ?
             {
                 l = s->z-actor[g_player[p].ps->i].floorz+(3<<8);
                 if (l > 1024 && s->yrepeat > 32 && s->extra > 0)
@@ -6624,7 +6624,7 @@ void G_DoSpriteAnimations(int32_t ourx, int32_t oury, int32_t oura, int32_t smoo
 #endif
                             k = getofs_viewtype5(s, t, oura);
 
-                        if (sector[t->sectnum].lotag == 2) k += 1795-1405;
+                        if (sector[t->sectnum].lotag == ST_2_UNDERWATER) k += 1795-1405;
                         else if ((actor[i].floorz-s->z) > (64<<8)) k += 60;
 
                         t->picnum += k;
@@ -6852,7 +6852,7 @@ skip:
         switch (DYNAMICTILEMAP(s->picnum))
         {
         case LASERLINE__STATIC:
-            if (sector[t->sectnum].lotag == 2) t->pal = 8;
+            if (sector[t->sectnum].lotag == ST_2_UNDERWATER) t->pal = 8;
             t->z = sprite[s->owner].z-(3<<8);
             if (g_tripbombLaserMode == 2 && g_player[screenpeek].ps->heat_on == 0)
                 t->yrepeat = 0;
diff --git a/polymer/eduke32/source/gameexec.c b/polymer/eduke32/source/gameexec.c
index 3597361ec..12026f454 100644
--- a/polymer/eduke32/source/gameexec.c
+++ b/polymer/eduke32/source/gameexec.c
@@ -366,7 +366,7 @@ void A_Fall(int32_t iActor)
         c = 0;
     else
     {
-        if (G_CheckForSpaceCeiling(s->sectnum) || sector[s->sectnum].lotag == 2)
+        if (G_CheckForSpaceCeiling(s->sectnum) || sector[s->sectnum].lotag == ST_2_UNDERWATER)
             c = g_spriteGravity/6;
     }
 
@@ -397,7 +397,7 @@ void A_Fall(int32_t iActor)
 #endif
        )
     {
-        if (sector[s->sectnum].lotag == 2 && s->zvel > 3122)
+        if (sector[s->sectnum].lotag == ST_2_UNDERWATER && s->zvel > 3122)
             s->zvel = 3144;
         s->z += s->zvel = min(6144, s->zvel+c);
     }
@@ -1280,7 +1280,7 @@ skip_check:
             {
                 int32_t j = g_spriteGravity;
 
-                if (G_CheckForSpaceCeiling(vm.g_sp->sectnum) || sector[vm.g_sp->sectnum].lotag == 2)
+                if (G_CheckForSpaceCeiling(vm.g_sp->sectnum) || sector[vm.g_sp->sectnum].lotag == ST_2_UNDERWATER)
                     j = g_spriteGravity/6;
                 else if (G_CheckForSpaceFloor(vm.g_sp->sectnum))
                     j = 0;
@@ -1322,7 +1322,7 @@ skip_check:
                         actor[vm.g_i].extra = 1;
                         vm.g_sp->zvel = 0;
                     }
-                    else if (vm.g_sp->zvel > 2048  && sector[vm.g_sp->sectnum].lotag != 1)
+                    else if (vm.g_sp->zvel > 2048  && sector[vm.g_sp->sectnum].lotag != ST_1_ABOVE_WATER)
                     {
                         j = vm.g_sp->sectnum;
                         pushmove((vec3_t *)vm.g_sp,(int16_t *)&j,128L,(4L<<8),(4L<<8),CLIPMASK0);
@@ -1340,7 +1340,7 @@ skip_check:
                     vm.g_sp->z = (actor[vm.g_i].floorz - ZOFFSET);
                 continue;
             }
-            else if (sector[vm.g_sp->sectnum].lotag == 1)
+            else if (sector[vm.g_sp->sectnum].lotag == ST_1_ABOVE_WATER)
             {
                 switch (DYNAMICTILEMAP(vm.g_sp->picnum))
                 {
@@ -3119,11 +3119,11 @@ nullquote:
         continue;
 
         case CON_IFONWATER:
-            VM_CONDITIONAL(sector[vm.g_sp->sectnum].lotag == 1 && klabs(vm.g_sp->z-sector[vm.g_sp->sectnum].floorz) < (32<<8));
+            VM_CONDITIONAL(sector[vm.g_sp->sectnum].lotag == ST_1_ABOVE_WATER && klabs(vm.g_sp->z-sector[vm.g_sp->sectnum].floorz) < (32<<8));
             continue;
 
         case CON_IFINWATER:
-            VM_CONDITIONAL(sector[vm.g_sp->sectnum].lotag == 2);
+            VM_CONDITIONAL(sector[vm.g_sp->sectnum].lotag == ST_2_UNDERWATER);
             continue;
 
         case CON_IFCOUNT:
@@ -5219,7 +5219,7 @@ void A_Execute(int32_t iActor,int32_t iPlayer,int32_t lDist)
             return;
         }
 
-    if (vm.g_sp->statnum != 1)
+    if (vm.g_sp->statnum != STAT_ACTOR)
         return;
 
     if (A_CheckEnemySprite(vm.g_sp))
diff --git a/polymer/eduke32/source/player.c b/polymer/eduke32/source/player.c
index 128b074d4..8388bda9b 100644
--- a/polymer/eduke32/source/player.c
+++ b/polymer/eduke32/source/player.c
@@ -65,7 +65,7 @@ void P_UpdateScreenPal(DukePlayer_t *p)
     }
     else
     {
-        if (sector[p->cursectnum].lotag == 2) p->palette = WATERPAL;
+        if (sector[p->cursectnum].lotag == ST_2_UNDERWATER) p->palette = WATERPAL;
         else p->palette = BASEPAL;
         intowater = 1;
     }
@@ -141,7 +141,7 @@ static void A_DoWaterTracers(int32_t x1,int32_t y1,int32_t z1,int32_t x2,int32_t
         if (sect < 0)
             break;
 
-        if (sector[sect].lotag == 2)
+        if (sector[sect].lotag == ST_2_UNDERWATER)
             A_InsertSprite(sect,x1,y1,z1,WATERBUBBLE,-32,4+(krand()&3),4+(krand()&3),krand()&2047,0,0,g_player[0].ps->i,5);
         else
             A_InsertSprite(sect,x1,y1,z1,SMALLSMOKE,-32,14,14,0,0,0,g_player[0].ps->i,5);
@@ -639,7 +639,7 @@ int32_t A_Shoot(int32_t i, int32_t atwith)
                         }
                     }
                 }
-                else if (p >= 0 && zvel > 0 && sector[hit.sect].lotag == 1)
+                else if (p >= 0 && zvel > 0 && sector[hit.sect].lotag == ST_1_ABOVE_WATER)
                 {
                     j = A_Spawn(g_player[p].ps->i,WATERSPLASH2);
                     sprite[j].x = hit.pos.x;
@@ -766,7 +766,7 @@ int32_t A_Shoot(int32_t i, int32_t atwith)
 
             if (ProjectileData[atwith].workslike & PROJECTILE_WATERBUBBLES)
             {
-                if ((krand()&15) == 0 && sector[hit.sect].lotag == 2)
+                if ((krand()&15) == 0 && sector[hit.sect].lotag == ST_2_UNDERWATER)
                     A_DoWaterTracers(hit.pos.x,hit.pos.y,hit.pos.z,srcvect.x,srcvect.y,srcvect.z,8-(ud.multimode>>1));
             }
 
@@ -1170,7 +1170,7 @@ DOSKIPBULLETHOLE:
                         }
                     }
                 }
-                else if (p >= 0 && zvel > 0 && sector[hit.sect].lotag == 1)
+                else if (p >= 0 && zvel > 0 && sector[hit.sect].lotag == ST_1_ABOVE_WATER)
                 {
                     j = A_Spawn(g_player[p].ps->i,WATERSPLASH2);
                     sprite[j].x = hit.pos.x;
@@ -1272,7 +1272,7 @@ DOSKIPBULLETHOLE:
 
             if (hit.sect < 0) return -1;
 
-            if ((krand()&15) == 0 && sector[hit.sect].lotag == 2)
+            if ((krand()&15) == 0 && sector[hit.sect].lotag == ST_2_UNDERWATER)
                 A_DoWaterTracers(hit.pos.x,hit.pos.y,hit.pos.z,
                                  srcvect.x,srcvect.y,srcvect.z,8-(ud.multimode>>1));
 
@@ -1656,6 +1656,7 @@ SKIPBULLETHOLE:
             if (hit.wall >= 0 && hit.sect >= 0)
                 if (((hit.pos.x-srcvect.x)*(hit.pos.x-srcvect.x)+(hit.pos.y-srcvect.y)*(hit.pos.y-srcvect.y)) < (290*290))
                 {
+                    // ST_2_UNDERWATER
                     if (wall[hit.wall].nextsector >= 0)
                     {
                         if (sector[wall[hit.wall].nextsector].lotag <= 2 && sector[hit.sect].lotag <= 2)
@@ -1803,7 +1804,7 @@ SKIPBULLETHOLE:
                 if (j < 0)
                     zvel = (100-ps->horiz-ps->horizoff)*98;
             }
-            else if (s->statnum != 3)
+            else if (s->statnum != STAT_EFFECTOR)
             {
                 j = A_FindPlayer(s,&x);
                 l = ldist(&sprite[g_player[j].ps->i],s);
@@ -3260,7 +3261,7 @@ static int32_t P_DoCounters(DukePlayer_t *p)
         }
     }
 
-    if (p->cursectnum >= 0 && p->scuba_on == 0 && sector[p->cursectnum].lotag == 2)
+    if (p->cursectnum >= 0 && p->scuba_on == 0 && sector[p->cursectnum].lotag == ST_2_UNDERWATER)
     {
         if (p->inv_amount[GET_SCUBA] > 0)
         {
@@ -3930,6 +3931,7 @@ void P_ProcessWeapon(int32_t snum)
                         if (hit.sect < 0 || hit.sprite >= 0)
                             break;
 
+                        // ST_2_UNDERWATER
                         if (hit.wall >= 0 && sector[hit.sect].lotag > 2)
                             break;
 
@@ -3948,6 +3950,7 @@ void P_ProcessWeapon(int32_t snum)
                             j = nextspritesect[j];
                         }
 
+                        // ST_2_UNDERWATER
                         if (j == -1 && hit.wall >= 0 && (wall[hit.wall].cstat&16) == 0)
                             if ((wall[hit.wall].nextsector >= 0 &&
                                     sector[wall[hit.wall].nextsector].lotag <= 2) ||
@@ -4411,7 +4414,7 @@ void P_ProcessInput(int32_t snum)
     p->ohorizoff = p->horizoff;
 
     // calculates automatic view angle for playing without a mouse
-    if (p->aim_mode == 0 && p->on_ground && psectlotag != 2 && (sector[p->cursectnum].floorstat&2))
+    if (p->aim_mode == 0 && p->on_ground && psectlotag != ST_2_UNDERWATER && (sector[p->cursectnum].floorstat&2))
     {
         x = p->pos.x+(sintable[(p->ang+512)&2047]>>5);
         y = p->pos.y+(sintable[p->ang&2047]>>5);
@@ -4525,7 +4528,7 @@ void P_ProcessInput(int32_t snum)
         if ((numplayers < 2 || g_netServer) && p->dead_flag == 0)
             P_FragPlayer(snum);
 
-        if (psectlotag == 2)
+        if (psectlotag == ST_2_UNDERWATER)
         {
             if (p->on_warping_sector == 0)
             {
@@ -4670,7 +4673,7 @@ void P_ProcessInput(int32_t snum)
 
     i = 40;
 
-    if (psectlotag == 2)
+    if (psectlotag == ST_2_UNDERWATER)
     {
         // under water
         p->jumping_counter = 0;
@@ -4787,10 +4790,10 @@ void P_ProcessInput(int32_t snum)
             }
         }
 
-        if (shrunk == 0 && (psectlotag == 0 || psectlotag == 2)) k = 32;
+        if (shrunk == 0 && (psectlotag == 0 || psectlotag == ST_2_UNDERWATER)) k = 32;
         else k = 16;
 
-        if (psectlotag != 2 && p->scuba_on == 1)
+        if (psectlotag != ST_2_UNDERWATER && p->scuba_on == 1)
             p->scuba_on = 0;
 
         if (p->pos.z > (fz-(k<<8)))
@@ -4798,14 +4801,14 @@ void P_ProcessInput(int32_t snum)
         if (p->pos.z < (actor[p->i].ceilingz+(18<<8)))
             p->pos.z = actor[p->i].ceilingz+(18<<8);
     }
-    else if (psectlotag != 2)
+    else if (psectlotag != ST_2_UNDERWATER)
     {
         p->airleft = 15 * GAMETICSPERSEC; // 13 seconds
 
         if (p->scuba_on == 1)
             p->scuba_on = 0;
 
-        if (psectlotag == 1 && p->spritebridge == 0)
+        if (psectlotag == ST_1_ABOVE_WATER && p->spritebridge == 0)
         {
             if (shrunk == 0)
             {
@@ -4895,7 +4898,7 @@ void P_ProcessInput(int32_t snum)
                 }
 
                 if ((p->pos.z+p->vel.z) >= (fz-(i<<8)) && p->cursectnum >= 0)   // hit the ground
-                    if (sector[p->cursectnum].lotag != 1)
+                    if (sector[p->cursectnum].lotag != ST_1_ABOVE_WATER)
                     {
                         if (p->falling_counter > 62)
                             P_QuickKill(p);
@@ -4932,7 +4935,7 @@ void P_ProcessInput(int32_t snum)
                 p->scream_voice = -1;
             }
 
-            if (psectlotag != 1 && psectlotag != 2 && p->on_ground == 0 && p->vel.z > (6144>>1))
+            if (psectlotag != ST_1_ABOVE_WATER && psectlotag != ST_2_UNDERWATER && p->on_ground == 0 && p->vel.z > (6144>>1))
                 p->hard_landing = p->vel.z>>10;
 
             p->on_ground = 1;
@@ -4996,7 +4999,7 @@ void P_ProcessInput(int32_t snum)
 
             if (p->jumping_counter < (1024+256))
             {
-                if (psectlotag == 1 && p->jumping_counter > 768)
+                if (psectlotag == ST_1_ABOVE_WATER && p->jumping_counter > 768)
                 {
                     p->jumping_counter = 0;
                     p->vel.z = -512;
@@ -5017,7 +5020,7 @@ void P_ProcessInput(int32_t snum)
 
         p->pos.z += p->vel.z;
 
-        if ((psectlotag != 2 || cz != sector[p->cursectnum].ceilingz) && p->pos.z < (cz+(4<<8)))
+        if ((psectlotag != ST_2_UNDERWATER || cz != sector[p->cursectnum].ceilingz) && p->pos.z < (cz+(4<<8)))
         {
             p->jumping_counter = 0;
             if (p->vel.z < 0)
@@ -5039,7 +5042,7 @@ void P_ProcessInput(int32_t snum)
     {
         int32_t tempang = g_player[snum].sync->avel<<1;
 
-        if (psectlotag == 2) p->angvel =(tempang-(tempang>>3))*ksgn(doubvel);
+        if (psectlotag == ST_2_UNDERWATER) p->angvel =(tempang-(tempang>>3))*ksgn(doubvel);
         else p->angvel = tempang*ksgn(doubvel);
 
         p->ang += p->angvel;
@@ -5127,7 +5130,7 @@ void P_ProcessInput(int32_t snum)
                     }
                     break;
 
-                case 1:
+                case ST_1_ABOVE_WATER:
                     if (!p->spritebridge)
                     {
                         if ((krand()&1) == 0)
@@ -5149,7 +5152,7 @@ void P_ProcessInput(int32_t snum)
 
         j = 0;
 
-        if (psectlotag == 2)
+        if (psectlotag == ST_2_UNDERWATER)
             j = 0x1400;
         else if (p->on_ground && (TEST_SYNC_KEY(sb_snum, SK_CROUCH) || (*kb > 10 && aplWeaponWorksLike[p->curr_weapon][snum] == KNEE_WEAPON)))
             j = 0x2000;
@@ -5168,10 +5171,10 @@ void P_ProcessInput(int32_t snum)
     }
 
 HORIZONLY:
-    if (psectlotag == 1 || p->spritebridge == 1) i = (4L<<8);
+    if (psectlotag == ST_1_ABOVE_WATER || p->spritebridge == 1) i = (4L<<8);
     else i = (20L<<8);
 
-    if (p->cursectnum >= 0 && sector[p->cursectnum].lotag == 2) k = 0;
+    if (p->cursectnum >= 0 && sector[p->cursectnum].lotag == ST_2_UNDERWATER) k = 0;
     else k = 1;
 
     if (ud.noclip)
@@ -5193,7 +5196,7 @@ HORIZONLY:
         // this updatesectorz conflicts with Duke3d's way of teleporting through water,
         // so make it a bit conditional... OTOH, this way we have an ugly z jump when
         // changing from above water to underwater
-        if (sect >= 0 && !(sector[sect].lotag==1 && p->on_ground && fb>=0))
+        if (sect >= 0 && !(sector[sect].lotag==ST_1_ABOVE_WATER && p->on_ground && fb>=0))
         {
             if ((fb>=0 && !(sector[sect].floorstat&512)) || (cb>=0 && !(sector[sect].ceilingstat&512)))
             {
@@ -5208,14 +5211,14 @@ HORIZONLY:
 
     // This makes the player view lower when shrunk.  NOTE that it can get the
     // view below the sector floor (and does, when on the ground).
-    if (p->jetpack_on == 0 && psectlotag != 2 && psectlotag != 1 && shrunk)
+    if (p->jetpack_on == 0 && psectlotag != ST_2_UNDERWATER && psectlotag != ST_1_ABOVE_WATER && shrunk)
         p->pos.z += 32<<8;
 
     if (p->jetpack_on == 0)
     {
         if (s->xvel > 16)
         {
-            if (psectlotag != 1 && psectlotag != 2 && p->on_ground)
+            if (psectlotag != ST_1_ABOVE_WATER && psectlotag != ST_2_UNDERWATER && p->on_ground)
             {
                 p->pycount += 52;
                 p->pycount &= 2047;
@@ -5223,7 +5226,7 @@ HORIZONLY:
                     klabs(s->xvel*sintable[p->pycount])/1596;
             }
         }
-        else if (psectlotag != 2 && psectlotag != 1)
+        else if (psectlotag != ST_2_UNDERWATER && psectlotag != ST_1_ABOVE_WATER)
             p->pyoff = 0;
     }
 
@@ -5233,6 +5236,7 @@ HORIZONLY:
     setsprite(p->i,(vec3_t *)&p->pos.x);
     p->pos.z -= PHEIGHT;
 
+    // ST_2_UNDERWATER
     if (p->cursectnum >= 0 && psectlotag < 3)
     {
 //        p->cursectnum = s->sectnum;
@@ -5247,7 +5251,8 @@ HORIZONLY:
         }
     }
 
-    if (p->cursectnum >= 0 && truefdist < PHEIGHT && p->on_ground && psectlotag != 1 && shrunk == 0 && sector[p->cursectnum].lotag == 1)
+    if (p->cursectnum >= 0 && truefdist < PHEIGHT && p->on_ground &&
+            psectlotag != ST_1_ABOVE_WATER && shrunk == 0 && sector[p->cursectnum].lotag == ST_1_ABOVE_WATER)
         if (!A_CheckSoundPlaying(p->i,DUKE_ONWATER))
             A_PlaySound(DUKE_ONWATER,p->i);
 
diff --git a/polymer/eduke32/source/sector.c b/polymer/eduke32/source/sector.c
index fbde94ba5..1472f8141 100644
--- a/polymer/eduke32/source/sector.c
+++ b/polymer/eduke32/source/sector.c
@@ -329,7 +329,7 @@ void G_DoSectorAnimations(void)
                         }
 
             for (j=headspritesect[dasect]; j>=0; j=nextspritesect[j])
-                if (sprite[j].statnum != 3)
+                if (sprite[j].statnum != STAT_EFFECTOR)
                 {
                     actor[j].bposz = sprite[j].z;
                     sprite[j].z += v;
@@ -1084,6 +1084,7 @@ void G_OperateActivators(int32_t low,int32_t snum)
                     break;
                 }
 
+                // ST_2_UNDERWATER
                 if (sector[sprite[i].sectnum].lotag < 3)
                 {
                     j = headspritesect[sprite[i].sectnum];
@@ -1892,7 +1893,7 @@ void A_DamageWall(int32_t spr,int32_t dawallnum,const vec3_t *pos,int32_t atwith
         i= headspritestat[STAT_EFFECTOR];
         while (i >= 0)
         {
-            if (SHT == wall[dawallnum].lotag && SLT == 3)
+            if (SHT == wall[dawallnum].lotag && SLT == SE_3_RANDOM_LIGHTS_AFTER_SHOT_OUT)
             {
                 T3 = j;
                 T4 = darkestwall;
@@ -1963,7 +1964,7 @@ int32_t Sect_DamageCeiling(int32_t sn)
         j = krand()&1;
         while (i >= 0)
         {
-            if (SHT == (sector[sn].hitag) && SLT == 3)
+            if (SHT == (sector[sn].hitag) && SLT == SE_3_RANDOM_LIGHTS_AFTER_SHOT_OUT)
             {
                 T3 = j;
                 T5 = 1;
@@ -2354,7 +2355,7 @@ void A_DamageObject(int32_t i,int32_t sn)
         if ((sprite[i].cstat&16) && SHT == 0 && SLT == 0 && sprite[i].statnum == STAT_DEFAULT)
             break;
 
-        if ((sprite[sn].picnum == FREEZEBLAST || sprite[sn].owner != i) && sprite[i].statnum != 4)
+        if ((sprite[sn].picnum == FREEZEBLAST || sprite[sn].owner != i) && sprite[i].statnum != STAT_PROJECTILE)
         {
             if (A_CheckEnemySprite(&sprite[i]) == 1)
             {
diff --git a/polymer/eduke32/source/sounds.c b/polymer/eduke32/source/sounds.c
index cc0481757..5affe9a00 100644
--- a/polymer/eduke32/source/sounds.c
+++ b/polymer/eduke32/source/sounds.c
@@ -338,6 +338,7 @@ void S_Cleanup(void)
                 g_sounds[num].num--;
 
             // MUSICANDSFX uses t_data[0] to control restarting the sound
+            // ST_2_UNDERWATER
             if (i != -1 && sprite[i].picnum == MUSICANDSFX && sector[sprite[i].sectnum].lotag < 3 && sprite[i].lotag < 999)
                 actor[i].t_data[0] = 0;
 
@@ -605,7 +606,7 @@ int32_t S_PlaySound3D(int32_t num, int32_t i, const vec3_t *pos)
 
     if (explosionp)
     {
-        if (peekps->cursectnum > -1 && sector[peekps->cursectnum].lotag == 2)
+        if (peekps->cursectnum > -1 && sector[peekps->cursectnum].lotag == ST_2_UNDERWATER)
             pitch -= 1024;
     }
     else
@@ -613,7 +614,7 @@ int32_t S_PlaySound3D(int32_t num, int32_t i, const vec3_t *pos)
         if (sndist > 32767 && PN != MUSICANDSFX && (g_sounds[num].m & 3) == 0)
             return -1;
 
-        if (peekps->cursectnum > -1 && sector[peekps->cursectnum].lotag == 2 && (g_sounds[num].m&4) == 0)
+        if (peekps->cursectnum > -1 && sector[peekps->cursectnum].lotag == ST_2_UNDERWATER && (g_sounds[num].m&4) == 0)
             pitch = -768;
     }