diff --git a/source/build/src/polymost.cpp b/source/build/src/polymost.cpp
index a4b04a143..4901b8155 100644
--- a/source/build/src/polymost.cpp
+++ b/source/build/src/polymost.cpp
@@ -2202,7 +2202,7 @@ void polymost_scansector(int32_t sectnum)
             {
                 if ((spr->cstat&(64+48))!=(64+16) ||
                     (r_voxels && tiletovox[spr->picnum] >= 0 && voxmodels[tiletovox[spr->picnum]]) ||
-                    (r_voxels && gi->Voxelize(spr->picnum)) ||
+                    (r_voxels && gi->Voxelize(spr->picnum) > -1) ||
                     DMulScale(bcos(spr->ang), -s.x, bsin(spr->ang), -s.y, 6) > 0)
                     if (renderAddTsprite(z, sectnum))
                         break;
diff --git a/source/core/gamestruct.h b/source/core/gamestruct.h
index 664c878d3..f6a0dd697 100644
--- a/source/core/gamestruct.h
+++ b/source/core/gamestruct.h
@@ -101,7 +101,7 @@ struct GameInterface
 	virtual int chaseCamX(binangle ang) { return 0; }
 	virtual int chaseCamY(binangle ang) { return 0; }
 	virtual int chaseCamZ(fixedhoriz horiz) { return 0; }
-	virtual bool Voxelize(int sprnum) { return false; }
+	virtual int Voxelize(int sprnum) { return -1; }
 
 	virtual FString statFPS()
 	{
diff --git a/source/core/precache.cpp b/source/core/precache.cpp
index 0a4bc0b58..ed660c7cd 100644
--- a/source/core/precache.cpp
+++ b/source/core/precache.cpp
@@ -72,8 +72,9 @@ static void doprecache(int picnum, int palette)
 		if (r_voxels)
 		{
 			int vox = tiletovox[picnum];
+			if (vox == -1) vox = gi->Voxelize(picnum);
 			if (vox == -1 && isBlood()) vox = Blood::voxelIndex[picnum];
-			if (vox != -1 && voxmodels[vox] && voxmodels[vox]->model)
+			if (vox >= 0 && vox < MAXVOXELS && voxmodels[vox] && voxmodels[vox]->model)
 			{
 				FHWModelRenderer mr(*screen->RenderState(), 0);
 				voxmodels[vox]->model->BuildVertexBuffer(&mr);
@@ -127,5 +128,6 @@ void precacheMarkedTiles()
 		int dapalnum = pair->Key >> 32;
 		doprecache(dapicnum, dapalnum);
 	}
+	cachemap.Clear();
 }
 
diff --git a/source/core/precache.h b/source/core/precache.h
index 30c6cea27..bcf40813f 100644
--- a/source/core/precache.h
+++ b/source/core/precache.h
@@ -2,4 +2,5 @@
 
 void PrecacheHardwareTextures(int nTile);
 void markTileForPrecache(int tilenum, int palnum);
+void markVoxelForPrecache(int voxnum);
 void precacheMarkedTiles();
diff --git a/source/games/sw/src/game.cpp b/source/games/sw/src/game.cpp
index 064cfc44f..e77e64f6c 100644
--- a/source/games/sw/src/game.cpp
+++ b/source/games/sw/src/game.cpp
@@ -798,9 +798,9 @@ void GameInterface::FreeLevelData()
     ::GameInterface::FreeLevelData();
 }
 
-bool GameInterface::Voxelize(int sprnum) 
+int GameInterface::Voxelize(int sprnum) 
 { 
-    return (aVoxelArray[sprnum].Voxel >= 0);
+    return (aVoxelArray[sprnum].Voxel);
 }
 
 END_SW_NS
diff --git a/source/games/sw/src/game.h b/source/games/sw/src/game.h
index 799aa2065..e9ab4c651 100644
--- a/source/games/sw/src/game.h
+++ b/source/games/sw/src/game.h
@@ -2252,10 +2252,10 @@ struct GameInterface : ::GameInterface
     void WarpToCoords(int x, int y, int z, int a, int h) override;
     void ToggleThirdPerson() override;
     void SwitchCoopView() override;
-    int chaseCamX(binangle ang) { return -ang.bcos(-3); }
-    int chaseCamY(binangle ang) { return -ang.bsin(-3); }
-    int chaseCamZ(fixedhoriz horiz) { return horiz.asq16() >> 8; }
-    bool Voxelize(int sprnum);
+    int chaseCamX(binangle ang) override { return -ang.bcos(-3); }
+    int chaseCamY(binangle ang) override { return -ang.bsin(-3); }
+    int chaseCamZ(fixedhoriz horiz) override { return horiz.asq16() >> 8; }
+    int Voxelize(int sprnum) override;
 
 
     GameStats getStats() override;