diff --git a/source/games/duke/src/funct.h b/source/games/duke/src/funct.h
index 8b468dee1..de2e74638 100644
--- a/source/games/duke/src/funct.h
+++ b/source/games/duke/src/funct.h
@@ -172,8 +172,8 @@ void OnEvent(int id, int pnum = -1, DDukeActor* snum = nullptr, int dist = -1);
 DDukeActor* EGS(int whatsect, int s_x, int s_y, int s_z, int s_pn, int8_t s_s, int8_t s_xr, int8_t s_yr, int s_a, int s_ve, int s_zv, DDukeActor* s_ow, int8_t s_ss);
 void ceilingglass(DDukeActor* snum, int sectnum, int cnt);
 void spriteglass(DDukeActor* snum, int cnt);
-void lotsofcolourglass(DDukeActor* snum, int wallNum, int cnt);
-void lotsofglass(DDukeActor* snum, int wallnum, int cnt);
+void lotsofcolourglass(DDukeActor* snum, walltype* wallNum, int cnt);
+void lotsofglass(DDukeActor* snum, walltype* wallnum, int cnt);
 void checkplayerhurt_d(struct player_struct* p, const Collision& coll);
 void checkplayerhurt_r(struct player_struct* p, const Collision& coll);
 
diff --git a/source/games/duke/src/sectors.cpp b/source/games/duke/src/sectors.cpp
index a769161ec..f6620ef93 100644
--- a/source/games/duke/src/sectors.cpp
+++ b/source/games/duke/src/sectors.cpp
@@ -1229,7 +1229,7 @@ void breakwall(int newpn, DDukeActor* spr, walltype* wal)
 	wal->picnum = newpn;
 	S_PlayActorSound(VENT_BUST, spr);
 	S_PlayActorSound(GLASS_HEAVYBREAK, spr);
-	lotsofglass(spr, wallnum(wal), 10);
+	lotsofglass(spr, wal, 10);
 }
 
 //---------------------------------------------------------------------------
diff --git a/source/games/duke/src/sectors_d.cpp b/source/games/duke/src/sectors_d.cpp
index 1e123022a..15517850a 100644
--- a/source/games/duke/src/sectors_d.cpp
+++ b/source/games/duke/src/sectors_d.cpp
@@ -653,7 +653,7 @@ void checkhitwall_d(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 		case SEENINE:
 		case OOZFILTER:
 		case EXPLODINGBARREL:
-			lotsofglass(spr, wallnum(wal), 70);
+			lotsofglass(spr, wal, 70);
 			wal->cstat &= ~16;
 			wal->overpicnum = MIRRORBROKE;
 			wal->portalflags = 0;
@@ -710,7 +710,7 @@ void checkhitwall_d(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 				{
 					updatesector(x, y, &sn); if (sn < 0) return;
 					wal->overpicnum = GLASS2;
-					lotsofglass(spr, wallnum(wal), 10);
+					lotsofglass(spr, wal, 10);
 					wal->cstat = 0;
 
 					if (wal->nextwall >= 0)
@@ -725,7 +725,7 @@ void checkhitwall_d(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 				}
 				case STAINGLASS1:
 					updatesector(x, y, &sn); if (sn < 0) return;
-					lotsofcolourglass(spr, wallnum(wal), 80);
+					lotsofcolourglass(spr, wal, 80);
 					wal->cstat = 0;
 					if (wal->nextwall >= 0)
 						wal->nextWall()->cstat = 0;
@@ -769,7 +769,7 @@ void checkhitwall_d(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 	case SCREENBREAK19:
 	case BORNTOBEWILDSCREEN:
 
-		lotsofglass(spr, wallnum(wal), 30);
+		lotsofglass(spr, wal, 30);
 		wal->picnum = W_SCREENBREAK + (krand() % 3);
 		S_PlayActorSound(GLASS_HEAVYBREAK, spr);
 		return;
@@ -833,7 +833,7 @@ void checkhitwall_d(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 		if (rnd(128))
 			S_PlayActorSound(GLASS_HEAVYBREAK, spr);
 		else S_PlayActorSound(GLASS_BREAKING, spr);
-		lotsofglass(spr, wallnum(wal), 30);
+		lotsofglass(spr, wal, 30);
 
 		if (wal->picnum == WALLLIGHT1)
 			wal->picnum = WALLLIGHTBUST1;
@@ -1036,7 +1036,7 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 		if (!isWorldTour())
 			break;
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		deletesprite(targ);
 		return;
 
@@ -1067,7 +1067,7 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 			}
 			else
 			{
-				lotsofglass(targ, -1, 3);
+				lotsofglass(targ, nullptr, 3);
 				deletesprite(targ);
 			}
 		}
@@ -1187,21 +1187,21 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 			fi.lotsofmoney(targ, 4 + (krand() & 3));
 		else if (s->picnum == STATUE || s->picnum == STATUEFLASH)
 		{
-			lotsofcolourglass(targ, -1, 40);
+			lotsofcolourglass(targ, nullptr, 40);
 			S_PlayActorSound(GLASS_HEAVYBREAK, targ);
 		}
 		else if (s->picnum == VASE)
-			lotsofglass(targ, -1, 40);
+			lotsofglass(targ, nullptr, 40);
 
 		S_PlayActorSound(GLASS_BREAKING, targ);
 		s->ang = krand() & 2047;
-		lotsofglass(targ, -1, 8);
+		lotsofglass(targ, nullptr, 8);
 		deletesprite(targ);
 		break;
 	case FETUS:
 		s->picnum = FETUSBROKE;
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		break;
 	case FETUSBROKE:
 		for (j = 0; j < 48; j++)
@@ -1214,13 +1214,13 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 		[[fallthrough]];
 	case BOTTLE7:
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		deletesprite(targ);
 		break;
 	case HYDROPLANT:
 		s->picnum = BROKEHYDROPLANT;
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		break;
 
 	case FORCESPHERE:
@@ -1240,7 +1240,7 @@ void checkhitsprite_d(DDukeActor* targ, DDukeActor* proj)
 			S_PlayActorSound(GLASS_BREAKING, targ);
 			s->z += 16 << 8;
 			s->cstat = 0;
-			lotsofglass(targ, -1, 5);
+			lotsofglass(targ, nullptr, 5);
 		}
 		break;
 
diff --git a/source/games/duke/src/sectors_r.cpp b/source/games/duke/src/sectors_r.cpp
index 0ab783e80..ed2acddb0 100644
--- a/source/games/duke/src/sectors_r.cpp
+++ b/source/games/duke/src/sectors_r.cpp
@@ -998,7 +998,7 @@ void checkhitwall_r(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 		case SEENINE:
 		case OOZFILTER:
 		case EXPLODINGBARREL:
-			lotsofglass(spr, wallnum(wal), 70);
+			lotsofglass(spr, wal, 70);
 			wal->cstat &= ~16;
 			wal->overpicnum = MIRRORBROKE;
 			wal->portalflags = 0;
@@ -1045,7 +1045,7 @@ void checkhitwall_r(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 				{
 					updatesector(x, y, &sn); if (sn < 0) return;
 					wal->overpicnum = GLASS2;
-					lotsofglass(spr, wallnum(wal), 10);
+					lotsofglass(spr, wal, 10);
 					wal->cstat = 0;
 
 					if (wal->nextwall >= 0)
@@ -1060,7 +1060,7 @@ void checkhitwall_r(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 				}
 				case STAINGLASS1:
 					updatesector(x, y, &sn); if (sn < 0) return;
-					lotsofcolourglass(spr, wallnum(wal), 80);
+					lotsofcolourglass(spr, wal, 80);
 					wal->cstat = 0;
 					if (wal->nextwall >= 0)
 						wal->nextWall()->cstat = 0;
@@ -1250,7 +1250,7 @@ void checkhitwall_r(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 	case SCREENBREAK7:
 	case SCREENBREAK8:
 
-		lotsofglass(spr, wallnum(wal), 30);
+		lotsofglass(spr, wal, 30);
 		wal->picnum = W_SCREENBREAK + (krand() % (isRRRA() ? 2 : 3));
 		S_PlayActorSound(GLASS_HEAVYBREAK, spr);
 		return;
@@ -1284,7 +1284,7 @@ void checkhitwall_r(DDukeActor* spr, walltype* wal, int x, int y, int z, int atw
 		if (rnd(128))
 			S_PlayActorSound(GLASS_HEAVYBREAK, spr);
 		else S_PlayActorSound(GLASS_BREAKING, spr);
-		lotsofglass(spr, wallnum(wal), 30);
+		lotsofglass(spr, wal, 30);
 
 		if (wal->picnum == RRTILE1814)
 			wal->picnum = RRTILE1817;
@@ -1892,12 +1892,12 @@ void checkhitsprite_r(DDukeActor* targ, DDukeActor* proj)
 	case RRTILE2123:
 		s->picnum = RRTILE2124;
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		break;
 	case RRTILE3773:
 		s->picnum = RRTILE8651;
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		break;
 	case RRTILE7533:
 		s->picnum = RRTILE5035;
@@ -2034,7 +2034,7 @@ void checkhitsprite_r(DDukeActor* targ, DDukeActor* proj)
 	case RRTILE2030:
 		s->picnum = RRTILE2034;
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		break;
 	case RRTILE2893:
 	case RRTILE2915:
@@ -2056,7 +2056,7 @@ void checkhitsprite_r(DDukeActor* targ, DDukeActor* proj)
 			break;
 		}
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		break;
 	case RRTILE2156:
 	case RRTILE2158:
@@ -2064,13 +2064,13 @@ void checkhitsprite_r(DDukeActor* targ, DDukeActor* proj)
 	case RRTILE2175:
 		s->picnum++;
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		break;
 	case RRTILE2137:
 	case RRTILE2151:
 	case RRTILE2152:
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		s->picnum++;
 		for (k = 0; k < 6; k++)
 			EGS(s->sectnum, s->x, s->y, s->z - (8 << 8), SCRAP6 + (krand() & 15), -8, 48, 48, krand() & 2047, (krand() & 63) + 64, -(krand() & 4095) - (s->zvel >> 2), targ, 5);
@@ -2238,15 +2238,15 @@ void checkhitsprite_r(DDukeActor* targ, DDukeActor* proj)
 			fi.lotsofmoney(targ, 4 + (krand() & 3));
 		else if (s->picnum == STATUE || s->picnum == STATUEFLASH)
 		{
-			lotsofcolourglass(targ, -1, 40);
+			lotsofcolourglass(targ, nullptr, 40);
 			S_PlayActorSound(GLASS_HEAVYBREAK, targ);
 		}
 		else if (s->picnum == VASE)
-			lotsofglass(targ, -1, 40);
+			lotsofglass(targ, nullptr, 40);
 
 		S_PlayActorSound(GLASS_BREAKING, targ);
 		s->ang = krand() & 2047;
-		lotsofglass(targ, -1, 8);
+		lotsofglass(targ, nullptr, 8);
 		deletesprite(targ);
 		break;
 	case RRTILE2654:
@@ -2256,7 +2256,7 @@ void checkhitsprite_r(DDukeActor* targ, DDukeActor* proj)
 		[[fallthrough]];
 	case BOTTLE7:
 		S_PlayActorSound(GLASS_BREAKING, targ);
-		lotsofglass(targ, -1, 10);
+		lotsofglass(targ, nullptr, 10);
 		deletesprite(targ);
 		break;
 	case FORCESPHERE:
diff --git a/source/games/duke/src/spawn.cpp b/source/games/duke/src/spawn.cpp
index 5eba8ded8..8d58082a1 100644
--- a/source/games/duke/src/spawn.cpp
+++ b/source/games/duke/src/spawn.cpp
@@ -1091,7 +1091,7 @@ void spawneffector(DDukeActor* actor)
 //
 //---------------------------------------------------------------------------
 
-void lotsofglass(DDukeActor *actor, int wallnum, int n)
+void lotsofglass(DDukeActor *actor, walltype* wal, int n)
 {
 	int j, z, a;
 	int sect;
@@ -1099,7 +1099,7 @@ void lotsofglass(DDukeActor *actor, int wallnum, int n)
 
 	sect = -1;
 
-	if (wallnum < 0)
+	if (wal == nullptr)
 	{
 		for (j = n - 1; j >= 0; j--)
 		{
@@ -1109,7 +1109,6 @@ void lotsofglass(DDukeActor *actor, int wallnum, int n)
 		return;
 	}
 
-	auto wal = &wall[wallnum];
 	int x1 = wal->x;
 	int y1 = wal->y;
 	auto delta = wal->delta() / (n + 1);
@@ -1189,14 +1188,14 @@ void ceilingglass(DDukeActor* actor, int sectnum, int n)
 //
 //---------------------------------------------------------------------------
 
-void lotsofcolourglass(DDukeActor* actor, int wallnum, int n)
+void lotsofcolourglass(DDukeActor* actor, walltype* wal, int n)
 {
 	int j, z;
 	int sect = -1;
 	int a;;
 	auto sp = actor->s;
 
-	if (wallnum < 0)
+	if (wal == nullptr)
 	{
 		for (j = n - 1; j >= 0; j--)
 		{
@@ -1207,12 +1206,10 @@ void lotsofcolourglass(DDukeActor* actor, int wallnum, int n)
 		return;
 	}
 	
-	auto& wal = wall[wallnum];
+	int x1 = wal->x;
+	int y1 = wal->y;
 
-	int x1 = wal.x;
-	int y1 = wal.y;
-
-	auto delta = wal.delta() / (n + 1);
+	auto delta = wal->delta() / (n + 1);
 
 	for (j = n; j > 0; j--)
 	{