diff --git a/source/blood/src/actor.cpp b/source/blood/src/actor.cpp
index b7d8fd26f..9b3af1744 100644
--- a/source/blood/src/actor.cpp
+++ b/source/blood/src/actor.cpp
@@ -7890,4 +7890,327 @@ bool isImmune(spritetype* pSprite, int dmgType, int minScale) {
 
     return true;
 }
+
+#ifdef POLYMER
+
+// this is the same crap as in game.c's tspr manipulation.  puke.
+// XXX: may access tilesizy out-of-bounds by bad user code.
+#define LIGHTRAD(spriteNum, s) (s->yrepeat * tilesiz[s->picnum].y)
+#define LIGHTRAD2(spriteNum, s) ((s->yrepeat + ((rand() % s->yrepeat)>>2)) * tilesiz[s->picnum].y)
+
+void G_AddGameLight(int lightRadius, int spriteNum, int zOffset, int lightRange, int lightColor, int lightPrio)
+{
+    auto const s = &sprite[spriteNum];
+
+    if (videoGetRenderMode() != REND_POLYMER || pr_lighting != 1)
+        return;
+
+    if (gPolymerLight[spriteNum].lightptr == NULL)
+    {
+#pragma pack(push, 1)
+        _prlight mylight;
+#pragma pack(pop)
+        Bmemset(&mylight, 0, sizeof(mylight));
+
+        mylight.sector = s->sectnum;
+        mylight.x = s->x;
+        mylight.y = s->y;
+        mylight.z = s->z - zOffset;
+        mylight.color[0] = lightColor & 255;
+        mylight.color[1] = (lightColor >> 8) & 255;
+        mylight.color[2] = (lightColor >> 16) & 255;
+        mylight.radius = lightRadius;
+        gPolymerLight[spriteNum].lightmaxrange = mylight.range = lightRange;
+
+        mylight.priority = lightPrio;
+        mylight.tilenum = 0;
+
+        mylight.publicflags.emitshadow = 1;
+        mylight.publicflags.negative = 0;
+
+        gPolymerLight[spriteNum].lightId = polymer_addlight(&mylight);
+        if (gPolymerLight[spriteNum].lightId >= 0)
+            gPolymerLight[spriteNum].lightptr = &prlights[gPolymerLight[spriteNum].lightId];
+        return;
+    }
+
+    s->z -= zOffset;
+
+    if (lightRange<gPolymerLight[spriteNum].lightmaxrange>> 1)
+        gPolymerLight[spriteNum].lightmaxrange = 0;
+
+    if (lightRange > gPolymerLight[spriteNum].lightmaxrange || lightPrio != gPolymerLight[spriteNum].lightptr->priority ||
+        Bmemcmp(&sprite[spriteNum], gPolymerLight[spriteNum].lightptr, sizeof(int32_t) * 3))
+    {
+        if (lightRange > gPolymerLight[spriteNum].lightmaxrange)
+            gPolymerLight[spriteNum].lightmaxrange = lightRange;
+
+        Bmemcpy(gPolymerLight[spriteNum].lightptr, &sprite[spriteNum], sizeof(int32_t) * 3);
+        gPolymerLight[spriteNum].lightptr->sector = s->sectnum;
+        gPolymerLight[spriteNum].lightptr->flags.invalidate = 1;
+    }
+
+    gPolymerLight[spriteNum].lightptr->priority = lightPrio;
+    gPolymerLight[spriteNum].lightptr->range = lightRange;
+    gPolymerLight[spriteNum].lightptr->color[0] = lightColor & 255;
+    gPolymerLight[spriteNum].lightptr->color[1] = (lightColor >> 8) & 255;
+    gPolymerLight[spriteNum].lightptr->color[2] = (lightColor >> 16) & 255;
+
+    s->z += zOffset;
+}
+
+void actDoLight(int nSprite)
+{
+    auto const pSprite = &sprite[nSprite];
+    int savedFires = 0;
+    if (((sector[pSprite->sectnum].floorz - sector[pSprite->sectnum].ceilingz) < 16) || pSprite->z > sector[pSprite->sectnum].floorz)
+    {
+        if (gPolymerLight[nSprite].lightptr != NULL)
+            DeleteLight(nSprite);
+    }
+    else
+    {
+        if (gPolymerLight[nSprite].lightptr != NULL && gPolymerLight[nSprite].lightcount)
+        {
+            if (!(--gPolymerLight[nSprite].lightcount))
+                DeleteLight(nSprite);
+        }
+
+        if (pr_lighting != 1)
+            return;
+
+        switch (pSprite->type)
+        {
+        case kMissileTeslaRegular:
+            {
+                int32_t x = ((sintable[(pSprite->ang+512)&2047])>>6);
+                int32_t y = ((sintable[(pSprite->ang)&2047])>>6);
+
+                pSprite->x -= x;
+                pSprite->y -= y;
+
+                G_AddGameLight(0, nSprite, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), 2048, 80+(252<<8)+(120<<16),PR_LIGHT_PRIO_HIGH_GAME);
+
+                pSprite->x += x;
+                pSprite->y += y;
+            }
+            break;
+        }
+    }
+#if 0
+    if (((sector[pSprite->sectnum].floorz - sector[pSprite->sectnum].ceilingz) < 16) || pSprite->z > sector[pSprite->sectnum].floorz || pSprite->z > actor[spriteNum].floorz ||
+        (pSprite->picnum != SECTOREFFECTOR && ((pSprite->cstat & 32768) || pSprite->yrepeat < 4)) ||
+        A_CheckSpriteFlags(spriteNum, SFLAG_NOLIGHT) || (A_CheckSpriteFlags(spriteNum, SFLAG_USEACTIVATOR) && sector[pSprite->sectnum].lotag & 16384))
+    {
+        if (actor[spriteNum].lightptr != NULL)
+            A_DeleteLight(spriteNum);
+    }
+    else
+    {
+        if (actor[spriteNum].lightptr != NULL && actor[spriteNum].lightcount)
+        {
+            if (!(--actor[spriteNum].lightcount))
+                A_DeleteLight(spriteNum);
+        }
+
+        if (pr_lighting != 1)
+            return;
+
+#ifndef EDUKE32_STANDALONE
+        for (int ii=0; ii<2; ii++)
+        {
+            if (pSprite->picnum <= 0)  // oob safety
+                break;
+
+            switch (DYNAMICTILEMAP(pSprite->picnum-1+ii))
+            {
+            case DIPSWITCH__STATIC:
+            case DIPSWITCH2__STATIC:
+            case DIPSWITCH3__STATIC:
+            case PULLSWITCH__STATIC:
+            case SLOTDOOR__STATIC:
+            case LIGHTSWITCH__STATIC:
+            case SPACELIGHTSWITCH__STATIC:
+            case SPACEDOORSWITCH__STATIC:
+            case FRANKENSTINESWITCH__STATIC:
+            case POWERSWITCH1__STATIC:
+            case LOCKSWITCH1__STATIC:
+            case POWERSWITCH2__STATIC:
+            case TECHSWITCH__STATIC:
+            case ACCESSSWITCH__STATIC:
+            case ACCESSSWITCH2__STATIC:
+                {
+                    if ((pSprite->cstat & 32768) || A_CheckSpriteFlags(spriteNum, SFLAG_NOLIGHT))
+                    {
+                        if (actor[spriteNum].lightptr != NULL)
+                            A_DeleteLight(spriteNum);
+                        break;
+                    }
+
+                    vec2_t const d = { sintable[(pSprite->ang+512)&2047]>>7, sintable[(pSprite->ang)&2047]>>7 };
+
+                    pSprite->x += d.x;
+                    pSprite->y += d.y;
+
+                    int16_t sectnum = pSprite->sectnum;
+                    updatesector(pSprite->x, pSprite->y, &sectnum);
+
+                    if ((unsigned) sectnum >= MAXSECTORS || pSprite->z > sector[sectnum].floorz || pSprite->z < sector[sectnum].ceilingz)
+                        goto POOP;
+
+                    G_AddGameLight(0, spriteNum, (pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1, 512-ii*128,
+                        ii==0 ? (172+(200<<8)+(104<<16)) : 216+(52<<8)+(20<<16), PR_LIGHT_PRIO_LOW);
+
+                POOP:
+                    pSprite->x -= d.x;
+                    pSprite->y -= d.y;
+                }
+                break;
+            }
+        }
+
+        switch (DYNAMICTILEMAP(pSprite->picnum))
+        {
+        case ATOMICHEALTH__STATIC:
+            G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), LIGHTRAD2(spriteNum, pSprite), 128+(128<<8)+(255<<16),PR_LIGHT_PRIO_HIGH_GAME);
+            break;
+
+        case FIRE__STATIC:
+        case FIRE2__STATIC:
+        case BURNING__STATIC:
+        case BURNING2__STATIC:
+            {
+                uint32_t color;
+                int32_t jj;
+
+                static int32_t savedfires[32][4];  // sectnum x y z
+
+                /*
+                if (Actor[i].floorz - Actor[i].ceilingz < 128) break;
+                if (s->z > Actor[i].floorz+2048) break;
+                */
+
+                switch (pSprite->pal)
+                {
+                case 1: color = 128+(128<<8)+(255<<16); break;
+                case 2: color = 255+(48<<8)+(48<<16); break;
+                case 8: color = 48+(255<<8)+(48<<16); break;
+                default: color = 240+(160<<8)+(80<<16); break;
+                }
+
+                for (jj=savedFires-1; jj>=0; jj--)
+                    if (savedfires[jj][0]==pSprite->sectnum && savedfires[jj][1]==(pSprite->x>>3) &&
+                        savedfires[jj][2]==(pSprite->y>>3) && savedfires[jj][3]==(pSprite->z>>7))
+                        break;
+
+                if (jj==-1 && savedFires<32)
+                {
+                    jj = savedFires;
+                    G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), LIGHTRAD2(spriteNum, pSprite), color, PR_LIGHT_PRIO_HIGH_GAME);
+                    savedfires[jj][0] = pSprite->sectnum;
+                    savedfires[jj][1] = pSprite->x>>3;
+                    savedfires[jj][2] = pSprite->y>>3;
+                    savedfires[jj][3] = pSprite->z>>7;
+                    savedFires++;
+                }
+            }
+            break;
+
+        case OOZFILTER__STATIC:
+            if (pSprite->xrepeat > 4)
+                G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), 4096, 176+(252<<8)+(120<<16),PR_LIGHT_PRIO_HIGH_GAME);
+            break;
+        case FLOORFLAME__STATIC:
+        case FIREBARREL__STATIC:
+        case FIREVASE__STATIC:
+            G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<2), LIGHTRAD2(spriteNum, pSprite)>>1, 255+(95<<8),PR_LIGHT_PRIO_HIGH_GAME);
+            break;
+
+        case EXPLOSION2__STATIC:
+            if (!actor[spriteNum].lightcount)
+            {
+                // XXX: This block gets CODEDUP'd too much.
+                int32_t x = ((sintable[(pSprite->ang+512)&2047])>>6);
+                int32_t y = ((sintable[(pSprite->ang)&2047])>>6);
+
+                pSprite->x -= x;
+                pSprite->y -= y;
+
+                G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), LIGHTRAD(spriteNum, pSprite), 240+(160<<8)+(80<<16),
+                    pSprite->yrepeat > 32 ? PR_LIGHT_PRIO_HIGH_GAME : PR_LIGHT_PRIO_LOW_GAME);
+
+                pSprite->x += x;
+                pSprite->y += y;
+            }
+            break;
+        case FORCERIPPLE__STATIC:
+        case TRANSPORTERBEAM__STATIC:
+            G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), LIGHTRAD(spriteNum, pSprite), 80+(80<<8)+(255<<16),PR_LIGHT_PRIO_LOW_GAME);
+            break;
+        case GROWSPARK__STATIC:
+            {
+                int32_t x = ((sintable[(pSprite->ang+512)&2047])>>6);
+                int32_t y = ((sintable[(pSprite->ang)&2047])>>6);
+
+                pSprite->x -= x;
+                pSprite->y -= y;
+
+                G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), 1024, 216+(52<<8)+(20<<16),PR_LIGHT_PRIO_HIGH_GAME);
+
+                pSprite->x += x;
+                pSprite->y += y;
+            }
+            break;
+        case SHRINKEREXPLOSION__STATIC:
+            {
+                int32_t x = ((sintable[(pSprite->ang+512)&2047])>>6);
+                int32_t y = ((sintable[(pSprite->ang)&2047])>>6);
+
+                pSprite->x -= x;
+                pSprite->y -= y;
+
+                G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), 2048, 176+(252<<8)+(120<<16),PR_LIGHT_PRIO_HIGH_GAME);
+
+                pSprite->x += x;
+                pSprite->y += y;
+            }
+            break;
+        case FREEZEBLAST__STATIC:
+            G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), LIGHTRAD(spriteNum, pSprite)<<2, 72+(88<<8)+(140<<16),PR_LIGHT_PRIO_HIGH_GAME);
+            break;
+        case COOLEXPLOSION1__STATIC:
+            G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), LIGHTRAD(spriteNum, pSprite)<<2, 128+(0<<8)+(255<<16),PR_LIGHT_PRIO_HIGH_GAME);
+            break;
+        case SHRINKSPARK__STATIC:
+            G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), LIGHTRAD(spriteNum, pSprite), 176+(252<<8)+(120<<16),PR_LIGHT_PRIO_HIGH_GAME);
+            break;
+        case FIRELASER__STATIC:
+            if (pSprite->statnum == STAT_PROJECTILE)
+                G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), 64 * pSprite->yrepeat, 255+(95<<8),PR_LIGHT_PRIO_LOW_GAME);
+            break;
+        case RPG__STATIC:
+            G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), 128 * pSprite->yrepeat, 255+(95<<8),PR_LIGHT_PRIO_LOW_GAME);
+            break;
+        case SHOTSPARK1__STATIC:
+            if (actor[spriteNum].t_data[2] == 0) // check for first frame of action
+            {
+                int32_t x = ((sintable[(pSprite->ang+512)&2047])>>7);
+                int32_t y = ((sintable[(pSprite->ang)&2047])>>7);
+
+                pSprite->x -= x;
+                pSprite->y -= y;
+
+                G_AddGameLight(0, spriteNum, ((pSprite->yrepeat*tilesiz[pSprite->picnum].y)<<1), 8 * pSprite->yrepeat, 240+(160<<8)+(80<<16),PR_LIGHT_PRIO_LOW_GAME);
+                actor[spriteNum].lightcount = 1;
+
+                pSprite->x += x;
+                pSprite->y += y;
+            }
+            break;
+        }
+#endif
+    }
+#endif
+}
+#endif // POLYMER
 END_BLD_NS
diff --git a/source/blood/src/actor.h b/source/blood/src/actor.h
index d3163b508..8426bcb5b 100644
--- a/source/blood/src/actor.h
+++ b/source/blood/src/actor.h
@@ -200,6 +200,10 @@ extern int gDudeDrag;
 extern short gAffectedSectors[kMaxSectors];
 extern short gAffectedXWalls[kMaxXWalls];
 
+#ifdef POLYMER
+extern 
+#endif
+
 inline bool IsPlayerSprite(spritetype *pSprite)
 {
     if (pSprite->type >= kDudePlayer1 && pSprite->type <= kDudePlayer8)
@@ -220,6 +224,11 @@ inline void actBurnSprite(int nSource, XSPRITE *pXSprite, int nTime)
     pXSprite->burnSource = nSource;
 }
 
+#ifdef POLYMER
+void actAddGameLight(int lightRadius, int spriteNum, int zOffset, int lightRange, int lightColor, int lightPrio);
+void actDoLight(int spriteNum);
+#endif
+
 bool IsItemSprite(spritetype *pSprite);
 bool IsWeaponSprite(spritetype *pSprite);
 bool IsAmmoSprite(spritetype *pSprite);
diff --git a/source/blood/src/blood.cpp b/source/blood/src/blood.cpp
index c9f2a5505..5eeb81201 100644
--- a/source/blood/src/blood.cpp
+++ b/source/blood/src/blood.cpp
@@ -160,11 +160,6 @@ enum gametokens
 
 int blood_globalflags;
 
-void G_Polymer_UnInit(void)
-{
-    // NUKE-TODO:
-}
-
 void ShutDown(void)
 {
     if (!in3dmode())
@@ -478,6 +473,29 @@ void G_LoadMapHack(char* outbuf, const char* filename)
     }
 }
 
+#ifdef POLYMER
+void G_RefreshLights(void)
+{
+    if (Numsprites && videoGetRenderMode() == REND_POLYMER)
+    {
+        int statNum = 0;
+
+        do
+        {
+            int spriteNum = headspritestat[statNum++];
+
+            while (spriteNum >= 0)
+            {
+                actDoLight(spriteNum);
+                spriteNum = nextspritestat[spriteNum];
+            }
+        }
+        while (statNum < MAXSTATUS);
+    }
+}
+#endif // POLYMER
+
+
 PLAYER gPlayerTemp[kMaxPlayers];
 int gHealthTemp[kMaxPlayers];
 
@@ -917,6 +935,9 @@ void ProcessFrame(void)
     DoSectorPanning();
     actProcessSprites();
     actPostProcess();
+#ifdef POLYMER
+    G_RefreshLights();
+#endif
     viewCorrectPrediction();
     ambProcess();
     viewUpdateDelirium();
diff --git a/source/blood/src/db.cpp b/source/blood/src/db.cpp
index 190c7d786..502b62142 100644
--- a/source/blood/src/db.cpp
+++ b/source/blood/src/db.cpp
@@ -46,6 +46,10 @@ SPRITEHIT gSpriteHit[kMaxXSprites];
 
 int xvel[kMaxSprites], yvel[kMaxSprites], zvel[kMaxSprites];
 
+#ifdef POLYMER
+PolymerLight_t gPolymerLight[kMaxSprites];
+#endif
+
 char qsprite_filler[kMaxSprites], qsector_filler[kMaxSectors];
 
 int gVisibility;
@@ -60,6 +64,27 @@ void dbCrypt(char *pPtr, int nLength, int nKey)
     }
 }
 
+#ifdef POLYMER
+
+void DeleteLight(int32_t s)
+{
+    if (gPolymerLight[s].lightId >= 0)
+        polymer_deletelight(gPolymerLight[s].lightId);
+    gPolymerLight[s].lightId = -1;
+    gPolymerLight[s].lightptr = NULL;
+}
+
+
+void G_Polymer_UnInit(void)
+{
+    int32_t i;
+
+    for (i = 0; i < kMaxSprites; i++)
+        DeleteLight(i);
+}
+#endif
+
+
 void InsertSpriteSect(int nSprite, int nSector)
 {
     dassert(nSprite >= 0 && nSprite < kMaxSprites);
@@ -190,6 +215,10 @@ int InsertSprite(int nSector, int nStat)
     pSprite->index = nSprite;
     xvel[nSprite] = yvel[nSprite] = zvel[nSprite] = 0;
 
+#ifdef POLYMER
+    gPolymerLight[nSprite].lightId = -1;
+#endif
+
     Numsprites++;
 
     return nSprite;
@@ -202,6 +231,10 @@ int qinsertsprite(short nSector, short nStat) // Replace
 
 int DeleteSprite(int nSprite)
 {
+#ifdef POLYMER
+    if (gPolymerLight[nSprite].lightptr != NULL && videoGetRenderMode() == REND_POLYMER)
+        DeleteLight(nSprite);
+#endif
     if (sprite[nSprite].extra > 0)
     {
         dbDeleteXSprite(sprite[nSprite].extra);
diff --git a/source/blood/src/db.h b/source/blood/src/db.h
index d0f48c50f..6cd060aa9 100644
--- a/source/blood/src/db.h
+++ b/source/blood/src/db.h
@@ -324,6 +324,21 @@ template<typename T> void GetSpriteExtents(T *pSprite, int *top, int *bottom)
     }
 }
 
+#ifdef POLYMER
+#pragma pack(push, 1)
+struct PolymerLight_t {
+    int16_t lightId, lightmaxrange;
+    _prlight* lightptr;
+    uint8_t lightcount;
+};
+#pragma pack(pop)
+
+extern PolymerLight_t gPolymerLight[kMaxSprites];
+
+void DeleteLight(int32_t s);
+
+#endif
+
 void InsertSpriteSect(int nSprite, int nSector);
 void RemoveSpriteSect(int nSprite);
 void InsertSpriteStat(int nSprite, int nStat);
diff --git a/source/blood/src/loadsave.cpp b/source/blood/src/loadsave.cpp
index 085afc05f..5ba194d5c 100644
--- a/source/blood/src/loadsave.cpp
+++ b/source/blood/src/loadsave.cpp
@@ -176,6 +176,31 @@ bool GameInterface::LoadGame(FSaveGameNode* node)
     gPaused = 0;
     gGameStarted = 1;
     bVanilla = false;
+    
+
+#ifdef USE_STRUCT_TRACKERS
+    Bmemset(sectorchanged, 0, sizeof(sectorchanged));
+    Bmemset(spritechanged, 0, sizeof(spritechanged));
+    Bmemset(wallchanged, 0, sizeof(wallchanged));
+#endif
+
+#ifdef USE_OPENGL
+    Polymost_prepare_loadboard();
+#endif
+
+#ifdef POLYMER
+    if (videoGetRenderMode() == REND_POLYMER)
+        polymer_loadboard();
+
+    // this light pointer nulling needs to be outside the videoGetRenderMode check
+    // because we might be loading the savegame using another renderer but
+    // change to Polymer later
+    for (int i=0; i<kMaxSprites; i++)
+    {
+        gPolymerLight[i].lightptr = NULL;
+        gPolymerLight[i].lightId = -1;
+    }
+#endif
 
 	Mus_ResumeSaved();