diff --git a/src/common/models/model.h b/src/common/models/model.h
index 5fdec020c5..829e81776c 100644
--- a/src/common/models/model.h
+++ b/src/common/models/model.h
@@ -15,15 +15,16 @@ void FlushModels();
 extern TDeletingArray<FModel*> Models;
 extern TArray<FSpriteModelFrame> SpriteModelFrames;
 
-#define MAX_MODELS_PER_FRAME 4
 #define MD3_MAX_SURFACES	32
+#define MD3_MIN_MODELS	4
 
 struct FSpriteModelFrame
 {
-	int modelIDs[MAX_MODELS_PER_FRAME];
-	FTextureID skinIDs[MAX_MODELS_PER_FRAME];
-	FTextureID surfaceskinIDs[MAX_MODELS_PER_FRAME][MD3_MAX_SURFACES];
-	int modelframes[MAX_MODELS_PER_FRAME];
+	uint8_t modelsAmount = 0;
+	TArray<int> modelIDs;
+	TArray<FTextureID> skinIDs;
+	TArray<FTextureID> surfaceskinIDs;
+	TArray<int> modelframes;
 	float xscale, yscale, zscale;
 	// [BB] Added zoffset, rotation parameters and flags.
 	// Added xoffset, yoffset
diff --git a/src/common/models/models_md3.cpp b/src/common/models/models_md3.cpp
index 15224e4fe9..b706b4a7c9 100644
--- a/src/common/models/models_md3.cpp
+++ b/src/common/models/models_md3.cpp
@@ -306,9 +306,10 @@ void FMD3Model::AddSkins(uint8_t *hitlist)
 {
 	for (unsigned i = 0; i < Surfaces.Size(); i++)
 	{
-		if (curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].isValid())
+		int ssIndex = i + curMDLIndex * MD3_MAX_SURFACES;
+		if (curSpriteMDLFrame->surfaceskinIDs[ssIndex].isValid())
 		{
-			hitlist[curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].GetIndex()] |= FTextureManager::HIT_Flat;
+			hitlist[curSpriteMDLFrame->surfaceskinIDs[ssIndex].GetIndex()] |= FTextureManager::HIT_Flat;
 		}
 
 		MD3Surface * surf = &Surfaces[i];
@@ -357,9 +358,10 @@ void FMD3Model::RenderFrame(FModelRenderer *renderer, FGameTexture * skin, int f
 		FGameTexture *surfaceSkin = skin;
 		if (!surfaceSkin)
 		{
-			if (curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].isValid())
+			int ssIndex = i + curMDLIndex * MD3_MAX_SURFACES;
+			if (curSpriteMDLFrame->surfaceskinIDs[ssIndex].isValid())
 			{
-				surfaceSkin = TexMan.GetGameTexture(curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i], true);
+				surfaceSkin = TexMan.GetGameTexture(curSpriteMDLFrame->surfaceskinIDs[ssIndex], true);
 			}
 			else if (surf->numSkins > 0 && surf->Skins[0].isValid())
 			{
diff --git a/src/common/models/models_obj.cpp b/src/common/models/models_obj.cpp
index 264ffd6ac2..07bac6ea92 100644
--- a/src/common/models/models_obj.cpp
+++ b/src/common/models/models_obj.cpp
@@ -638,9 +638,10 @@ void FOBJModel::RenderFrame(FModelRenderer *renderer, FGameTexture * skin, int f
 		FGameTexture *userSkin = skin;
 		if (!userSkin)
 		{
-			if (i < MD3_MAX_SURFACES && curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].isValid())
+			int ssIndex = i + curMDLIndex * MD3_MAX_SURFACES;
+			if (i < MD3_MAX_SURFACES && curSpriteMDLFrame->surfaceskinIDs[ssIndex].isValid())
 			{
-				userSkin = TexMan.GetGameTexture(curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i], true);
+				userSkin = TexMan.GetGameTexture(curSpriteMDLFrame->surfaceskinIDs[ssIndex], true);
 			}
 			else if (surf->skin.isValid())
 			{
@@ -669,13 +670,14 @@ void FOBJModel::AddSkins(uint8_t* hitlist)
 {
 	for (size_t i = 0; i < surfaces.Size(); i++)
 	{
-		if (i < MD3_MAX_SURFACES && curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].isValid())
+		size_t ssIndex = i + curMDLIndex * MD3_MAX_SURFACES;
+		if (i < MD3_MAX_SURFACES && curSpriteMDLFrame->surfaceskinIDs[ssIndex].isValid())
 		{
 			// Precache skins manually reassigned by the user.
 			// On OBJs with lots of skins, such as Doom map OBJs exported from GZDB,
 			// there may be too many skins for the user to manually change, unless
 			// the limit is bumped or surfaceskinIDs is changed to a TArray<FTextureID>.
-			hitlist[curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][i].GetIndex()] |= FTextureManager::HIT_Flat;
+			hitlist[curSpriteMDLFrame->surfaceskinIDs[ssIndex].GetIndex()] |= FTextureManager::HIT_Flat;
 			return; // No need to precache skin that was replaced
 		}
 
diff --git a/src/common/models/models_ue1.cpp b/src/common/models/models_ue1.cpp
index 3066b7759f..9214063025 100644
--- a/src/common/models/models_ue1.cpp
+++ b/src/common/models/models_ue1.cpp
@@ -242,8 +242,9 @@ void FUE1Model::RenderFrame( FModelRenderer *renderer, FGameTexture *skin, int f
 		FGameTexture *sskin = skin;
 		if ( !sskin )
 		{
-			if ( curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][groups[i].texNum].isValid() )
-				sskin = TexMan.GetGameTexture(curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][groups[i].texNum], true);
+			int ssIndex = groups[i].texNum + curMDLIndex * MD3_MAX_SURFACES;
+			if (curSpriteMDLFrame->surfaceskinIDs[ssIndex].isValid())
+				sskin = TexMan.GetGameTexture(curSpriteMDLFrame->surfaceskinIDs[ssIndex], true);
 			if ( !sskin )
 			{
 				vofs += vsize;
@@ -302,9 +303,12 @@ void FUE1Model::BuildVertexBuffer( FModelRenderer *renderer )
 
 void FUE1Model::AddSkins( uint8_t *hitlist )
 {
-	for ( int i=0; i<numGroups; i++ )
-		if ( curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][groups[i].texNum].isValid() )
-			hitlist[curSpriteMDLFrame->surfaceskinIDs[curMDLIndex][groups[i].texNum].GetIndex()] |= FTextureManager::HIT_Flat;
+	for (int i = 0; i < numGroups; i++)
+	{
+		int ssIndex = groups[i].texNum + curMDLIndex * MD3_MAX_SURFACES;
+		if (curSpriteMDLFrame->surfaceskinIDs[ssIndex].isValid())
+			hitlist[curSpriteMDLFrame->surfaceskinIDs[ssIndex].GetIndex()] |= FTextureManager::HIT_Flat;
+	}
 }
 
 FUE1Model::~FUE1Model()
diff --git a/src/r_data/models.cpp b/src/r_data/models.cpp
index 0b8a458b4d..b2d077f29c 100644
--- a/src/r_data/models.cpp
+++ b/src/r_data/models.cpp
@@ -268,7 +268,7 @@ void RenderFrameModels(FModelRenderer *renderer, FLevelLocals *Level, const FSpr
 		}
 	}
 
-	for (int i = 0; i<MAX_MODELS_PER_FRAME; i++)
+	for (int i = 0; i < smf->modelsAmount; i++)
 	{
 		if (smf->modelIDs[i] != -1)
 		{
@@ -317,8 +317,12 @@ void InitModels()
 		FSpriteModelFrame smf;
 		memset(&smf, 0, sizeof(smf));
 		smf.isVoxel = true;
-		smf.modelIDs[1] = smf.modelIDs[2] = smf.modelIDs[3] = -1;
+		smf.modelsAmount = 1;
+		smf.modelframes.Alloc(1);
+		smf.modelframes[0] = -1;
+		smf.modelIDs.Alloc(1);
 		smf.modelIDs[0] = VoxelDefs[i]->Voxel->VoxelIndex;
+		smf.skinIDs.Alloc(1);
 		smf.skinIDs[0] = md->GetPaletteTexture();
 		smf.xscale = smf.yscale = smf.zscale = VoxelDefs[i]->Scale;
 		smf.angleoffset = VoxelDefs[i]->AngleOffset.Degrees;
@@ -380,7 +384,6 @@ static void ParseModelDefLump(int Lump)
 
 			FSpriteModelFrame smf;
 			memset(&smf, 0, sizeof(smf));
-			smf.modelIDs[0] = smf.modelIDs[1] = smf.modelIDs[2] = smf.modelIDs[3] = -1;
 			smf.xscale=smf.yscale=smf.zscale=1.f;
 
 			auto type = PClass::FindClass(sc.String);
@@ -389,6 +392,47 @@ static void ParseModelDefLump(int Lump)
 				sc.ScriptError("MODELDEF: Unknown actor type '%s'\n", sc.String);
 			}
 			smf.type = type;
+			FScanner::SavedPos scPos = sc.SavePos();
+			sc.MustGetStringName("{");
+			while (!sc.CheckString("}"))
+			{
+				sc.MustGetString();
+				if (sc.Compare("model"))
+				{
+					sc.MustGetNumber();
+					index = sc.Number;
+					if (index < 0)
+					{
+						sc.ScriptError("Model index must be 0 or greater in %s", type->TypeName.GetChars());
+					}
+					smf.modelsAmount = index + 1;
+				}
+			}
+			//Make sure modelsAmount is at least equal to MD3_MIN_MODELS(4) to ensure compatibility with old mods
+			if (smf.modelsAmount < MD3_MIN_MODELS)
+			{
+				smf.modelsAmount = MD3_MIN_MODELS;
+			}
+			//Allocate TArrays
+			smf.modelIDs.Alloc(smf.modelsAmount);
+			smf.skinIDs.Alloc(smf.modelsAmount);
+			smf.surfaceskinIDs.Alloc(smf.modelsAmount * MD3_MAX_SURFACES);
+			smf.modelframes.Alloc(smf.modelsAmount);
+			//Make sure all modelIDs are -1 by default
+			for (auto& modelID : smf.modelIDs)
+			{
+				modelID = -1;
+			}
+			//Make sure no TArray elements of type FTextureID are null. These elements will have a textureid (FTextureID.texnum) of 0.
+			for (auto& skinID : smf.skinIDs)
+			{
+				skinID = FTextureID(FNullTextureID());
+			}
+			for (auto& surfaceskinID : smf.surfaceskinIDs)
+			{
+				surfaceskinID = FTextureID(FNullTextureID());
+			}
+			sc.RestorePos(scPos);
 			sc.MustGetStringName("{");
 			while (!sc.CheckString("}"))
 			{
@@ -404,7 +448,11 @@ static void ParseModelDefLump(int Lump)
 				{
 					sc.MustGetNumber();
 					index = sc.Number;
-					if (index < 0 || index >= MAX_MODELS_PER_FRAME)
+					if (index < 0)
+					{
+						sc.ScriptError("Model index must be 0 or greater in %s", type->TypeName.GetChars());
+					}
+					else if (index >= smf.modelsAmount)
 					{
 						sc.ScriptError("Too many models in %s", type->TypeName.GetChars());
 					}
@@ -529,7 +577,7 @@ static void ParseModelDefLump(int Lump)
 				{
 					sc.MustGetNumber();
 					index=sc.Number;
-					if (index<0 || index>=MAX_MODELS_PER_FRAME)
+					if (index<0 || index>= smf.modelsAmount)
 					{
 						sc.ScriptError("Too many models in %s", type->TypeName.GetChars());
 					}
@@ -556,7 +604,7 @@ static void ParseModelDefLump(int Lump)
 					sc.MustGetNumber();
 					surface = sc.Number;
 
-					if (index<0 || index >= MAX_MODELS_PER_FRAME)
+					if (index<0 || index >= smf.modelsAmount)
 					{
 						sc.ScriptError("Too many models in %s", type->TypeName.GetChars());
 					}
@@ -568,14 +616,15 @@ static void ParseModelDefLump(int Lump)
 
 					sc.MustGetString();
 					FixPathSeperator(sc.String);
+					int ssIndex = surface + index * MD3_MAX_SURFACES;
 					if (sc.Compare(""))
 					{
-						smf.surfaceskinIDs[index][surface] = FNullTextureID();
+						smf.surfaceskinIDs[ssIndex] = FNullTextureID();
 					}
 					else
 					{
-						smf.surfaceskinIDs[index][surface] = LoadSkin(path.GetChars(), sc.String);
-						if (!smf.surfaceskinIDs[index][surface].isValid())
+						smf.surfaceskinIDs[ssIndex] = LoadSkin(path.GetChars(), sc.String);
+						if (!smf.surfaceskinIDs[ssIndex].isValid())
 						{
 							Printf("Surface Skin '%s' not found in '%s'\n",
 								sc.String, type->TypeName.GetChars());
@@ -610,7 +659,7 @@ static void ParseModelDefLump(int Lump)
 
 					sc.MustGetNumber();
 					index=sc.Number;
-					if (index<0 || index>=MAX_MODELS_PER_FRAME)
+					if (index<0 || index>= smf.modelsAmount)
 					{
 						sc.ScriptError("Too many models in %s", type->TypeName.GetChars());
 					}
diff --git a/src/rendering/hwrenderer/hw_precache.cpp b/src/rendering/hwrenderer/hw_precache.cpp
index 72b977f80c..7ad9192bcc 100644
--- a/src/rendering/hwrenderer/hw_precache.cpp
+++ b/src/rendering/hwrenderer/hw_precache.cpp
@@ -162,7 +162,7 @@ void hw_PrecacheTexture(uint8_t *texhitlist, TMap<PClassActor*, bool> &actorhitl
 			FSpriteModelFrame * smf = FindModelFrame(cls, state.sprite, state.Frame, false);
 			if (smf != NULL)
 			{
-				for (int i = 0; i < MAX_MODELS_PER_FRAME; i++)
+				for (int i = 0; i < smf->modelsAmount; i++)
 				{
 					if (smf->skinIDs[i].isValid())
 					{