diff --git a/src/avp/support/r2base.cpp b/src/avp/support/r2base.cpp
index 5ce7839..6206b6c 100644
--- a/src/avp/support/r2base.cpp
+++ b/src/avp/support/r2base.cpp
@@ -26,29 +26,6 @@
 /* Imported function prototypes ************************************/
 
 /* Imported data ***************************************************/
-#ifdef __cplusplus
-	extern "C"
-	{
-#endif
-
-		extern int D3DDriverMode;
-
-		#if 0
-		extern OurBool			DaveDebugOn;
-		extern FDIEXTENSIONTAG	FDIET_Dummy;
-		extern IFEXTENSIONTAG	IFET_Dummy;
-		extern FDIQUAD			FDIQuad_WholeScreen;
-		extern FDIPOS			FDIPos_Origin;
-		extern FDIPOS			FDIPos_ScreenCentre;
-		extern IFOBJECTLOCATION IFObjLoc_Origin;
-		extern UncompressedGlobalPlotAtomID UGPAID_StandardNull;
-		extern IFCOLOUR			IFColour_Dummy;
- 		extern IFVECTOR			IFVec_Zero;
-		#endif
-#ifdef __cplusplus
-	};
-#endif
-
 
 
 /* Exported globals ************************************************/
@@ -77,9 +54,10 @@ r2pos r2pos :: FixP_Scale
 	);
 }
 
+extern "C" {
+void D3D_Rectangle(int x0, int y0, int x1, int y1, int r, int g, int b, int a);
+};
 
-// Repository for code that ought to be in D3_FUNC.CPP
-#if 0
 void r2rect :: AlphaFill
 (
 	unsigned char R,
@@ -93,140 +71,8 @@ void r2rect :: AlphaFill
 		bValidPhys()
 	);
 
-	#if 0
-	float RecipW, RecipH;
-
-    // Check for textures that have not loaded properly
-    LOCALASSERT(TextureHandle != (D3DTEXTUREHANDLE) 0);
-	
-	if(ImageHeaderArray[imageNumber].ImageWidth==128)
-	{
-		RecipW = 1.0 /128.0;
-	}
-	else
-	{
-		float width = (float) ImageHeaderArray[imageNumber].ImageWidth;
-		RecipW = (1.0 / width);
-	}
-	if(ImageHeaderArray[imageNumber].ImageHeight==128)
-	{
-		RecipH = 1.0 / 128.0;
-	}
-	else
-	{
-		float height = (float) ImageHeaderArray[imageNumber].ImageHeight;
-		RecipH = (1.0 / height);
-	}
-	#endif
-
-
-	/* OUTPUT quadVerticesPtr TO EXECUTE BUFFER */
-	{
-		D3DCOLOR Colour;
-
-		switch (D3DDriverMode)
-		{
-			case D3DSoftwareRGBDriver:
-			{
-			  	Colour = RGBLIGHT_MAKE(R,G,B);
-				break;
-			}
-
-			case D3DSoftwareRampDriver:
-			{
-				Colour = RGB_MAKE(0,0,B);
-				break;
-			}
-			
-			default:
-			case D3DHardwareRGBDriver:
-			{
-		  		Colour = RGBALIGHT_MAKE(R,G,B,translucency);
-				break;
-			}
-		}
-
-		#if 1
-		{
-			D3DTLVERTEX *vertexPtr = &((LPD3DTLVERTEX)ExecuteBufferDataArea)[NumVertices];
-
-			/* Vertex 0 = Top left */
-			vertexPtr->sx= x0;
-			vertexPtr->sy= y0;
-			vertexPtr->color = Colour;
-			
-			NumVertices++;
-			vertexPtr++;
-
-			/* Vertex 1 = Top right */
-			vertexPtr->sx=( x1 - 1);
-			vertexPtr->sy=( y0 );
-			vertexPtr->color = Colour;
-			
-			NumVertices++;
-			vertexPtr++;
-
-			/* Vertex 2 = Bottom right */
-			vertexPtr->sx=( x1 - 1);
-			vertexPtr->sy=( y1 - 1);
-			vertexPtr->color = Colour;
-			
-			NumVertices++;
-			vertexPtr++;
-
-			/* Vertex 3 = Bottom left */
-			vertexPtr->sx=x0;
-			vertexPtr->sy=( y1 - 1);
-			vertexPtr->color = Colour;
-			
-			NumVertices++;
-		}
-		#else
-		int i = 4;
-		do
-		{
-			D3DTLVERTEX *vertexPtr = &((LPD3DTLVERTEX)ExecuteBufferDataArea)[NumVertices];
-			
-//			textprint("x %d, y %d, u %d, v %d\n",quadVerticesPtr->X,quadVerticesPtr->Y,quadVerticesPtr->U,quadVerticesPtr->V);
-			vertexPtr->sx=quadVerticesPtr->X;
-			vertexPtr->sy=quadVerticesPtr->Y;
-			#if 0
-			vertexPtr->tu = ((float)(quadVerticesPtr->U)) * RecipW;
-			vertexPtr->tv = ((float)(quadVerticesPtr->V)) * RecipH;
-			#endif
-
-			vertexPtr->color = Colour;
-			}
-			quadVerticesPtr++;
-			NumVertices++;
-		}
-	  	while(--i);
-		#endif
-	}
-
-	// set correct texture handle
-    if (0 != CurrTextureHandle)
-	{
-       OP_STATE_RENDER(1, ExecBufInstPtr);
-       STATE_DATA(D3DRENDERSTATE_TEXTUREHANDLE, 0, ExecBufInstPtr);
-	   CurrTextureHandle = 0;
-	}
-
-	/* output triangles to execute buffer */
-	OP_TRIANGLE_LIST(2, ExecBufInstPtr);
-	OUTPUT_TRIANGLE(0,1,3, 4);
-	OUTPUT_TRIANGLE(1,2,3, 4);
-	
-	/* check to see if buffer is getting full */
-	if (NumVertices > (MaxD3DVertices-12)) 
-	{
-	   WriteEndCodeToExecuteBuffer();
-  	   UnlockExecuteBufferAndPrepareForUse();
-	   ExecuteBuffer();
-  	   LockExecuteBuffer();
-	}
+	D3D_Rectangle(x0, y0, x1, y1, R, G, B, translucency);
 }
-#endif
 
 r2pos operator+ ( const r2pos& R2Pos_1, const r2pos& R2Pos_2 )
 {
diff --git a/src/main.c b/src/main.c
index 3bcf906..8659bfe 100644
--- a/src/main.c
+++ b/src/main.c
@@ -44,6 +44,8 @@ extern int NormalFrameTime;
 
 static SDL_Surface *surface;
 
+/* ** */
+
 void DirectReadKeyboard()
 {
 }
@@ -56,6 +58,8 @@ void ReadJoysticks()
 {
 }
 
+/* ** */
+
 PROCESSORTYPES ReadProcessorType()
 {
 	return PType_PentiumMMX;
@@ -104,6 +108,10 @@ int InitialiseWindowsSystem()
 	
 	glEnable(GL_TEXTURE_2D);
 
+	glPolygonMode(GL_FRONT, GL_FILL);
+	glPolygonMode(GL_BACK, GL_FILL);
+	glDisable(GL_CULL_FACE);
+	
 /*	
 	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 */	
@@ -483,16 +491,11 @@ void FlipBuffers()
 
 void ThisFramesRenderingHasBegun()
 {
-/*	fprintf(stderr, "ThisFramesRenderingHasBegun()\n"); */
-
-/* TODO: this should be in D3D_DrawBackdrop */
-	glClear(GL_COLOR_BUFFER_BIT);
+/* sets scene defaults */
 }
 
 void ThisFramesRenderingHasFinished()
 {
-/*	fprintf(stderr, "ThisFramesRenderingHasFinished()\n"); */
-
 /* This is where the queued drawing commands' execution takes place */
 
 	LightBlockDeallocation();
@@ -569,13 +572,13 @@ int main(int argc, char *argv[])
 //	AvP.PlayerType = I_Alien;
 //	SetLevelToLoad(AVP_ENVIRONMENT_FERARCO); /* starting alien level */
 
-	AvP.PlayerType = I_Marine;
+//	AvP.PlayerType = I_Marine;
 //	SetLevelToLoad(AVP_ENVIRONMENT_DERELICT); /* starting marine level */
 
-//	AvP.PlayerType = I_Predator;
-//	SetLevelToLoad(AVP_ENVIRONMENT_WATERFALL); /* starting predator level */
+	AvP.PlayerType = I_Predator;
+	SetLevelToLoad(AVP_ENVIRONMENT_WATERFALL); /* starting predator level */
 
-	SetLevelToLoad(AVP_ENVIRONMENT_LEADWORKS_MP); /* multiplayer */
+//	SetLevelToLoad(AVP_ENVIRONMENT_LEADWORKS_MP); /* multiplayer */
 
 //	SetLevelToLoad(AVP_ENVIRONMENT_E3DEMOSP); /* demo level */
 
diff --git a/src/opengl.c b/src/opengl.c
index b45c3cc..578acbf 100644
--- a/src/opengl.c
+++ b/src/opengl.c
@@ -17,6 +17,8 @@
 #include "krender.h"
 #include "kshape.h"
 #include "prototyp.h"
+#include "bh_types.h"
+#include "showcmds.h"
 #include "d3d_hud.h"
 #include "hud_layout.h"
 #include "avp_userprofile.h"
@@ -30,6 +32,7 @@ extern SCREENDESCRIPTORBLOCK ScreenDescriptorBlock;
 
 extern int SpecialFXImageNumber;
 extern int StaticImageNumber;
+extern int PredatorNumbersImageNumber;
 extern int BurningImageNumber;
 extern int HUDFontsImageNumber;
 
@@ -97,24 +100,103 @@ static void CheckTranslucencyModeIsCorrect(enum TRANSLUCENCY_TYPE mode)
 	CurrentTranslucencyMode = mode;
 }
 
+#define TA_MAXVERTICES		8
+typedef struct TriangleArray
+{
+	int elements;
+	
+	GLfloat v[TA_MAXVERTICES*4];
+	
+	GLfloat t[TA_MAXVERTICES*4];
+	
+	GLubyte c[TA_MAXVERTICES*4];
+} TriangleArray;
+
+TriangleArray tarr;
+
+static void DrawTriangles_T2F_C4UB_V4F()
+{
+	
+#define OUTPUT_VERTEX(d) \
+{ \
+	glColor4ubv	(&tarr.c[(d) * 4]);	\
+	glTexCoord2fv	(&tarr.t[(d) * 4]);	\
+	glVertex4fv	(&tarr.v[(d) * 4]);	\
+}
+#define OUTPUT_TRIANGLE(a, b, c) \
+{ \
+	OUTPUT_VERTEX((a));	\
+	OUTPUT_VERTEX((b));	\
+	OUTPUT_VERTEX((c));	\
+}
+
+	glBegin(GL_TRIANGLES);
+	switch(tarr.elements) {
+		case 3:
+			OUTPUT_TRIANGLE(0, 2, 1);
+			break;
+#if 0			
+		case 4:
+			OUTPUT_TRIANGLE(0, 1, 2);
+			OUTPUT_TRIANGLE(0, 2, 3);
+			break;
+#endif			
+		case 5:
+			OUTPUT_TRIANGLE(0, 1, 4);
+			OUTPUT_TRIANGLE(1, 3, 4);
+			OUTPUT_TRIANGLE(1, 2, 3);
+			break;
+#if 0			
+		case 6:
+			OUTPUT_TRIANGLE(0, 4, 5);
+			OUTPUT_TRIANGLE(0, 3, 4);
+			OUTPUT_TRIANGLE(0, 2, 3);
+			OUTPUT_TRIANGLE(0, 1, 2);
+			break;
+		case 7:
+			OUTPUT_TRIANGLE(0, 5, 6);
+			OUTPUT_TRIANGLE(0, 4, 5);
+			OUTPUT_TRIANGLE(0, 3, 4);
+			OUTPUT_TRIANGLE(0, 2, 3);
+			OUTPUT_TRIANGLE(0, 1, 2);
+			break;
+#endif			
+		case 8:
+			OUTPUT_TRIANGLE(0, 6, 7);
+		case 7:
+			OUTPUT_TRIANGLE(0, 5, 6);
+		case 6:
+			OUTPUT_TRIANGLE(0, 4, 5);
+			OUTPUT_TRIANGLE(0, 3, 4);
+		case 4:
+			OUTPUT_TRIANGLE(0, 2, 3);
+			OUTPUT_TRIANGLE(0, 1, 2);
+			
+			break;
+		default:
+			fprintf(stderr, "DrawTriangles_T2F_C4UB_V4F: tarr.elements = %d\n", tarr.elements);
+	}
+	glEnd();
+	
+#undef OUTPUT_TRIANGLE	
+#undef OUTPUT_VERTEX
+}
+		
 static void SelectPolygonBeginType(int points)
 {
-/* switch code that uses this to a triangle only drawer */
 	switch(points) {
-		case 1:
-			glBegin(GL_POINTS);
-			break;
-		case 2:
-			glBegin(GL_LINES);
-			break;
 		case 3:
 			glBegin(GL_TRIANGLES);
 			break;
 		case 4:
-			glBegin(GL_QUADS);
+		case 5:
+		case 6:
+		case 7:
+		case 8:
+			glBegin(GL_TRIANGLE_FAN);
 			break;
 		default:
-			glBegin(GL_POLYGON);
+			fprintf(stderr, "SelectPolygonBeginType: points = %d\n", points);
 			break;
 	}
 }
@@ -174,12 +256,59 @@ void D3D_DecalSystem_End()
 
 /* ** */
 
+void D3D_Rectangle(int x0, int y0, int x1, int y1, int r, int g, int b, int a)
+{
+	GLfloat x[4], y[4];
+	
+	if (y1 <= y0)
+		return;
+	
+	CheckTranslucencyModeIsCorrect(TRANSLUCENCY_GLOWING);
+	CheckBoundTextureIsCorrect(0);
+	
+	glColor4ub(r, g, b, a);
+
+	x[0] = x0;
+	x[0] =  (x[0] - ScreenDescriptorBlock.SDB_CentreX)/ScreenDescriptorBlock.SDB_CentreX;
+	y[0] = y0;
+	y[0] = -(y[0] - ScreenDescriptorBlock.SDB_CentreY)/ScreenDescriptorBlock.SDB_CentreY;
+	
+	x[1] = x1 - 1;
+	x[1] =  (x[1] - ScreenDescriptorBlock.SDB_CentreX)/ScreenDescriptorBlock.SDB_CentreX;
+	y[1] = y0;
+	y[1] = -(y[1] - ScreenDescriptorBlock.SDB_CentreY)/ScreenDescriptorBlock.SDB_CentreY;
+	
+	x[2] = x1 - 1;
+	x[2] =  (x[2] - ScreenDescriptorBlock.SDB_CentreX)/ScreenDescriptorBlock.SDB_CentreX;
+	y[2] = y1 - 1;
+	y[2] = -(y[2] - ScreenDescriptorBlock.SDB_CentreY)/ScreenDescriptorBlock.SDB_CentreY;
+	
+	x[3] = x0;
+	x[3] =  (x[3] - ScreenDescriptorBlock.SDB_CentreX)/ScreenDescriptorBlock.SDB_CentreX;
+	y[3] = y1 - 1;
+	y[3] = -(y[3] - ScreenDescriptorBlock.SDB_CentreY)/ScreenDescriptorBlock.SDB_CentreY;
+
+	SelectPolygonBeginType(3); /* triangles */
+	
+	glVertex3f(x[0], y[0], -1.0f);
+	glVertex3f(x[1], y[1], -1.0f);
+	glVertex3f(x[3], y[3], -1.0f);
+	
+	glVertex3f(x[1], y[1], -1.0f);
+	glVertex3f(x[2], y[2], -1.0f);
+	glVertex3f(x[3], y[3], -1.0f);
+	
+	glEnd();
+}
+
+/* ** */
+
 void D3D_ZBufferedGouraudTexturedPolygon_Output(POLYHEADER *inputPolyPtr, RENDERVERTEX *renderVerticesPtr)
 {
 	int texoffset;
 	D3DTexture *TextureHandle;
 	int i;
-	GLfloat ZNear, zvalue;
+	GLfloat ZNear;
 	float RecipW, RecipH;
 
 		
@@ -199,14 +328,13 @@ void D3D_ZBufferedGouraudTexturedPolygon_Output(POLYHEADER *inputPolyPtr, RENDER
 	
 	CheckBoundTextureIsCorrect(TextureHandle->id);
 	
-	// glBegin(GL_POLYGON);
-	SelectPolygonBeginType(RenderPolygon.NumberOfVertices);
+//	SelectPolygonBeginType(RenderPolygon.NumberOfVertices);
 	for (i = 0; i < RenderPolygon.NumberOfVertices; i++) {
 		RENDERVERTEX *vertices = &renderVerticesPtr[i];
 		GLfloat x, y, z;
 		int x1, y1;
 		GLfloat s, t;
-		GLfloat rhw = 1.0/(float)vertices->Z;
+		GLfloat rhw = 1.0/(float)vertices->Z, zvalue;
 		
 		s = ((float)vertices->U) * RecipW + (1.0f/256.0f);
 		t = ((float)vertices->V) * RecipH + (1.0f/256.0f);
@@ -216,7 +344,6 @@ void D3D_ZBufferedGouraudTexturedPolygon_Output(POLYHEADER *inputPolyPtr, RENDER
 			
 		x1 = (vertices->X*(Global_VDB_Ptr->VDB_ProjX+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreX;
 		y1 = (vertices->Y*(Global_VDB_Ptr->VDB_ProjY+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreY;
-
 #if 0
 		if (x1<Global_VDB_Ptr->VDB_ClipLeft) {
 			x1=Global_VDB_Ptr->VDB_ClipLeft;
@@ -239,6 +366,7 @@ void D3D_ZBufferedGouraudTexturedPolygon_Output(POLYHEADER *inputPolyPtr, RENDER
 		zvalue = vertices->Z+HeadUpDisplayZOffset;
 		z = 1.0 - 2*ZNear/zvalue;
 
+#if 0
 		glColor4ub(GammaValues[vertices->R], GammaValues[vertices->G], GammaValues[vertices->B], vertices->A);
 
 	/* they both work. */
@@ -248,10 +376,231 @@ void D3D_ZBufferedGouraudTexturedPolygon_Output(POLYHEADER *inputPolyPtr, RENDER
 #else
 		glTexCoord2f(s, t);
 		glVertex4f(x/rhw, y/rhw, z/rhw, 1/rhw);
+#endif
+
 #endif
 		
+		tarr.v[4*i+0] = x/rhw;
+		tarr.v[4*i+1] = y/rhw;
+		tarr.v[4*i+2] = z/rhw;
+		tarr.v[4*i+3] = 1/rhw;
+		
+		tarr.t[4*i+0] = s;
+		tarr.t[4*i+1] = t;
+		
+		tarr.c[4*i+0] = GammaValues[vertices->R];
+		tarr.c[4*i+1] = GammaValues[vertices->G];
+		tarr.c[4*i+2] = GammaValues[vertices->B];
+		tarr.c[4*i+3] = vertices->A;
 	}
-	glEnd();
+//	glEnd();
+
+	tarr.elements = RenderPolygon.NumberOfVertices;
+	DrawTriangles_T2F_C4UB_V4F();
+		
+	CurrTextureHandle = TextureHandle;
+}
+
+void D3D_SkyPolygon_Output(POLYHEADER *inputPolyPtr, RENDERVERTEX *renderVerticesPtr)
+{
+	int texoffset;
+	D3DTexture *TextureHandle;
+	int i;
+	GLfloat ZNear;
+	float RecipW, RecipH;
+
+		
+	ZNear = (GLfloat) (Global_VDB_Ptr->VDB_ClipZ * GlobalScale);
+	
+	texoffset = inputPolyPtr->PolyColour & ClrTxDefn;
+	if (texoffset) {
+		TextureHandle = (void *)ImageHeaderArray[texoffset].D3DTexture;
+	} else {
+		TextureHandle = CurrTextureHandle;
+	}
+	
+	CheckTranslucencyModeIsCorrect(RenderPolygon.TranslucencyMode);
+
+	RecipW = (1.0f/65536.0f)/128.0f;
+	RecipH = (1.0f/65536.0f)/128.0f;
+	
+	CheckBoundTextureIsCorrect(TextureHandle->id);
+	
+//	SelectPolygonBeginType(RenderPolygon.NumberOfVertices);
+	for (i = 0; i < RenderPolygon.NumberOfVertices; i++) {
+		RENDERVERTEX *vertices = &renderVerticesPtr[i];
+		GLfloat x, y, z;
+		int x1, y1;
+		GLfloat s, t;
+		GLfloat rhw = 1.0/(float)vertices->Z;
+		
+		s = ((float)vertices->U) * RecipW + (1.0f/256.0f);
+		t = ((float)vertices->V) * RecipH + (1.0f/256.0f);
+
+//		if (s < 0.0 || t < 0.0 || s >= 1.0 || t >= 1.0)
+//			fprintf(stderr, "HEY! s = %f, t = %f (%d, %d)\n", s, t, vertices->U, vertices->V);
+			
+		x1 = (vertices->X*(Global_VDB_Ptr->VDB_ProjX+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreX;
+		y1 = (vertices->Y*(Global_VDB_Ptr->VDB_ProjY+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreY;
+#if 0
+		if (x1<Global_VDB_Ptr->VDB_ClipLeft) {
+			x1=Global_VDB_Ptr->VDB_ClipLeft;
+		} else if (x1>Global_VDB_Ptr->VDB_ClipRight) {
+			x1=Global_VDB_Ptr->VDB_ClipRight;
+		}
+		
+		if (y1<Global_VDB_Ptr->VDB_ClipUp) {
+			y1=Global_VDB_Ptr->VDB_ClipUp;
+		} else if (y1>Global_VDB_Ptr->VDB_ClipDown) {
+			y1=Global_VDB_Ptr->VDB_ClipDown;
+		}
+#endif
+		x = x1;
+		y = y1;
+						
+		x =  (x - ScreenDescriptorBlock.SDB_CentreX)/ScreenDescriptorBlock.SDB_CentreX;
+		y = -(y - ScreenDescriptorBlock.SDB_CentreY)/ScreenDescriptorBlock.SDB_CentreY;
+
+//		zvalue = vertices->Z+HeadUpDisplayZOffset;
+//		z = 1.0 - 2*ZNear/zvalue;
+		z = 1.0f;
+
+#if 0		
+		glColor4ub(vertices->R, vertices->G, vertices->B, vertices->A);
+
+	/* they both work. */
+#if 0		
+		glTexCoord4f(s*rhw, t*rhw, 0, rhw);
+		glVertex3f(x, y, z);
+#else
+		glTexCoord2f(s, t);
+		glVertex4f(x/rhw, y/rhw, z/rhw, 1/rhw);
+#endif
+#endif
+		tarr.v[4*i+0] = x/rhw;
+		tarr.v[4*i+1] = y/rhw;
+		tarr.v[4*i+2] = z/rhw;
+		tarr.v[4*i+3] = 1/rhw;
+		
+		tarr.t[4*i+0] = s;
+		tarr.t[4*i+1] = t;
+		
+		tarr.c[4*i+0] = vertices->R;
+		tarr.c[4*i+1] = vertices->G;
+		tarr.c[4*i+2] = vertices->B;
+		tarr.c[4*i+3] = vertices->A;		
+	}
+//	glEnd();
+
+	tarr.elements = RenderPolygon.NumberOfVertices;
+	DrawTriangles_T2F_C4UB_V4F();
+	
+	CurrTextureHandle = TextureHandle;
+}
+
+void D3D_ZBufferedCloakedPolygon_Output(POLYHEADER *inputPolyPtr, RENDERVERTEX *renderVerticesPtr)
+{
+	int flags;
+	int texoffset;
+	int i;
+	D3DTexture *TextureHandle;
+	
+	float ZNear;
+	float RecipW, RecipH;
+	
+	ZNear = (float) (Global_VDB_Ptr->VDB_ClipZ * GlobalScale);
+	
+	flags = inputPolyPtr->PolyFlags;
+	texoffset = (inputPolyPtr->PolyColour & ClrTxDefn);
+	
+	TextureHandle = ImageHeaderArray[texoffset].D3DTexture;
+	
+	CheckBoundTextureIsCorrect(TextureHandle->id);
+	CheckTranslucencyModeIsCorrect(TRANSLUCENCY_NORMAL);
+	
+	if (TextureHandle->w == 128) {
+		RecipW = 1.0f / 128.0f;
+	} else {
+		float width = (float) TextureHandle->w;
+		RecipW = 1.0f / width;
+	}
+	
+	if (TextureHandle->h == 128) {
+		RecipH = 1.0f / 128.0f;
+	} else {
+		float height = (float) TextureHandle->h;
+		RecipH = 1.0f / height;
+	}
+	
+//	SelectPolygonBeginType(RenderPolygon.NumberOfVertices);                
+	for (i = 0; i < RenderPolygon.NumberOfVertices; i++) {
+		RENDERVERTEX *vertices = &renderVerticesPtr[i];
+		
+		GLfloat x, y, z;
+		int x1, y1;
+		GLfloat s, t;
+		GLfloat rhw = 1.0/(float)vertices->Z;
+		GLfloat zvalue;
+		
+		s = ((float)(vertices->U>>16)+0.5) * RecipW;
+		t = ((float)(vertices->V>>16)+0.5) * RecipH;
+		
+//		if (s < 0.0 || t < 0.0 || s >= 1.0 || t >= 1.0)
+//			fprintf(stderr, "HEY! s = %f, t = %f (%d, %d)\n", s, t, vertices->U, vertices->V);
+			
+		x1 = (vertices->X*(Global_VDB_Ptr->VDB_ProjX+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreX;
+		y1 = (vertices->Y*(Global_VDB_Ptr->VDB_ProjY+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreY;
+#if 0
+		if (x1<Global_VDB_Ptr->VDB_ClipLeft) {
+			x1=Global_VDB_Ptr->VDB_ClipLeft;
+		} else if (x1>Global_VDB_Ptr->VDB_ClipRight) {
+			x1=Global_VDB_Ptr->VDB_ClipRight;
+		}
+		
+		if (y1<Global_VDB_Ptr->VDB_ClipUp) {
+			y1=Global_VDB_Ptr->VDB_ClipUp;
+		} else if (y1>Global_VDB_Ptr->VDB_ClipDown) {
+			y1=Global_VDB_Ptr->VDB_ClipDown;
+		}
+#endif
+		x = x1;
+		y = y1;
+						
+		x =  (x - ScreenDescriptorBlock.SDB_CentreX)/ScreenDescriptorBlock.SDB_CentreX;
+		y = -(y - ScreenDescriptorBlock.SDB_CentreY)/ScreenDescriptorBlock.SDB_CentreY;
+
+		zvalue = vertices->Z+HeadUpDisplayZOffset;
+		z = 1.0 - 2*ZNear/zvalue;
+
+#if 0
+		glColor4ub(vertices->R, vertices->G, vertices->B, vertices->A);
+
+	/* they both work. */
+#if 0		
+		glTexCoord4f(s*rhw, t*rhw, 0, rhw);
+		glVertex3f(x, y, z);
+#else
+		glTexCoord2f(s, t);
+		glVertex4f(x/rhw, y/rhw, z/rhw, 1/rhw);
+#endif
+#endif		
+		tarr.v[4*i+0] = x/rhw;
+		tarr.v[4*i+1] = y/rhw;
+		tarr.v[4*i+2] = z/rhw;
+		tarr.v[4*i+3] = 1/rhw;
+		
+		tarr.t[4*i+0] = s;
+		tarr.t[4*i+1] = t;
+		
+		tarr.c[4*i+0] = vertices->R;
+		tarr.c[4*i+1] = vertices->G;
+		tarr.c[4*i+2] = vertices->B;
+		tarr.c[4*i+3] = vertices->A;
+	}
+//	glEnd();
+
+	tarr.elements = RenderPolygon.NumberOfVertices;
+	DrawTriangles_T2F_C4UB_V4F();
 	
 	CurrTextureHandle = TextureHandle;
 }
@@ -456,7 +805,6 @@ void D3D_Particle_Output(PARTICLE *particlePtr, RENDERVERTEX *renderVerticesPtr)
 		glColor4ub(FastRandom()&255, FastRandom()&255, FastRandom()&255, particleDescPtr->Alpha);
 	}
 
-	//glBegin(GL_POLYGON);
 	SelectPolygonBeginType(RenderPolygon.NumberOfVertices);	
 	for (i = 0; i < RenderPolygon.NumberOfVertices; i++) {
 		RENDERVERTEX *vertices = &renderVerticesPtr[i];
@@ -531,7 +879,6 @@ void D3D_PredatorThermalVisionPolygon_Output(POLYHEADER *inputPolyPtr, RENDERVER
 		
 		x1 = (vertices->X*(Global_VDB_Ptr->VDB_ProjX+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreX;
 		y1 = (vertices->Y*(Global_VDB_Ptr->VDB_ProjY+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreY;
-
 #if 0
 		if (x1<Global_VDB_Ptr->VDB_ClipLeft) {
 			x1=Global_VDB_Ptr->VDB_ClipLeft;
@@ -566,6 +913,65 @@ void D3D_PredatorThermalVisionPolygon_Output(POLYHEADER *inputPolyPtr, RENDERVER
 	glEnd();
 }
 
+void D3D_ZBufferedGouraudPolygon_Output(POLYHEADER *inputPolyPtr, RENDERVERTEX *renderVerticesPtr)
+{
+	int flags, i;
+	float ZNear;
+	
+	ZNear = (float) (Global_VDB_Ptr->VDB_ClipZ * GlobalScale);
+	
+	flags = inputPolyPtr->PolyFlags;
+	
+	CheckTranslucencyModeIsCorrect(RenderPolygon.TranslucencyMode);
+	CheckBoundTextureIsCorrect(0);
+	
+	SelectPolygonBeginType(RenderPolygon.NumberOfVertices);
+	for (i = 0; i < RenderPolygon.NumberOfVertices; i++) {
+		RENDERVERTEX *vertices = &renderVerticesPtr[i];	
+		int x1, y1;
+		GLfloat x, y, z;
+		float rhw, zvalue;
+		
+		x1 = (vertices->X*(Global_VDB_Ptr->VDB_ProjX+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreX;
+		y1 = (vertices->Y*(Global_VDB_Ptr->VDB_ProjY+1))/vertices->Z+Global_VDB_Ptr->VDB_CentreY;
+#if 0
+		if (x1<Global_VDB_Ptr->VDB_ClipLeft) {
+			x1=Global_VDB_Ptr->VDB_ClipLeft;
+		} else if (x1>Global_VDB_Ptr->VDB_ClipRight) {
+			x1=Global_VDB_Ptr->VDB_ClipRight;
+		}
+				
+		if (y1<Global_VDB_Ptr->VDB_ClipUp) {
+			y1=Global_VDB_Ptr->VDB_ClipUp;
+		} else if (y1>Global_VDB_Ptr->VDB_ClipDown) {
+			y1=Global_VDB_Ptr->VDB_ClipDown;
+		}
+#endif
+		
+		x = x1;
+		y = y1;
+		
+		x =  (x - ScreenDescriptorBlock.SDB_CentreX)/ScreenDescriptorBlock.SDB_CentreX;
+		y = -(y - ScreenDescriptorBlock.SDB_CentreY)/ScreenDescriptorBlock.SDB_CentreY;
+		
+		zvalue = vertices->Z+HeadUpDisplayZOffset;
+		z = 1.0 - 2*ZNear/zvalue;
+		
+//		zvalue = vertices->Z+HeadUpDisplayZOffset;
+//		zvalue = ((zvalue-ZNear)/zvalue);
+		
+		rhw = 1.0/(float)vertices->Z;
+		
+		if (flags & iflag_transparent)
+			glColor4ub(vertices->R, vertices->G, vertices->B, vertices->A);
+		else
+			glColor4ub(vertices->R, vertices->G, vertices->B, 255);
+		
+		glVertex4f(x/rhw, y/rhw, z/rhw, 1/rhw);
+	}
+	glEnd();		
+}
+
 void D3D_PlayerOnFireOverlay()
 {
 	int c = 128;
@@ -739,7 +1145,6 @@ void DrawNoiseOverlay(int tr)
 	CheckTranslucencyModeIsCorrect(TRANSLUCENCY_GLOWING);
 	// CheckFilteringModeIsCorrect(FILTERING_BILINEAR_ON);
 	CheckBoundTextureIsCorrect(tex->id);
-	// CheckDepthFuncIsCorrect(GL_ALWAYS);
 	glDepthFunc(GL_ALWAYS);
 	
 	u = FastRandom()&255;
@@ -859,15 +1264,75 @@ void D3D_PredatorScreenInversionOverlay()
 	glVertex3f( 1.0f, -1.0f, 1.0f);
 	glVertex3f(-1.0f,  1.0f, 1.0f);
 	
-	glVertex3f( 1.0f, -1.0f, 0.0f);
-	glVertex3f( 1.0f,  1.0f, 0.0f);
-	glVertex3f(-1.0f,  1.0f, 0.0f);
+	glVertex3f( 1.0f, -1.0f, 1.0f);
+	glVertex3f( 1.0f,  1.0f, 1.0f);
+	glVertex3f(-1.0f,  1.0f, 1.0f);
 	
 	glEnd();
 	
 	glDepthFunc(GL_LEQUAL);
 }
 
+void DrawScanlinesOverlay(float level)
+{
+	D3DTexture *tex;
+	GLfloat x[4], y[4], s[4], t[4];
+	float v, size;
+	int c;
+	int a;
+
+	tex = ImageHeaderArray[PredatorNumbersImageNumber].D3DTexture;
+	
+	CheckTranslucencyModeIsCorrect(TRANSLUCENCY_NORMAL);
+	//CheckFilteringModeIsCorrect(FILTERING_BILINEAR_ON);
+	CheckBoundTextureIsCorrect(tex->id);
+	glDepthFunc(GL_ALWAYS);
+	
+	c = 255;
+	a = 64.0f+level*64.0f;
+	
+	v = 128.0f;
+	size = 128.0f*(1.0f-level*0.8f);
+	
+	glColor4ub(c, c, c, a);
+
+	x[0] = -1.0f;
+	y[0] = -1.0f;
+	s[0] = (v - size) / 256.0f;
+	t[0] = 1.0f;
+	x[1] =  1.0f;
+	y[1] = -1.0f;
+	s[1] = (v - size) / 256.0f;
+	t[1] = 1.0f;
+	x[2] =  1.0f;
+	y[2] =  1.0f;
+	s[2] = (v + size) / 256.0f;
+	t[2] = 1.0f;
+	x[3] = -1.0f;
+	y[3] =  1.0f;
+	s[3] = (v + size) / 256.0f;
+	t[3] = 1.0f;
+	
+	SelectPolygonBeginType(3); /* triangles */
+		
+	glTexCoord2f(s[0], t[0]);
+	glVertex3f(x[0], y[0], 1.0f);
+	glTexCoord2f(s[1], t[1]);
+	glVertex3f(x[1], y[1], 1.0f);
+	glTexCoord2f(s[3], t[3]);
+	glVertex3f(x[3], y[3], 1.0f);
+	
+	glTexCoord2f(s[1], t[1]);
+	glVertex3f(x[1], y[1], 1.0f);
+	glTexCoord2f(s[2], t[2]);
+	glVertex3f(x[2], y[2], 1.0f);
+	glTexCoord2f(s[3], t[3]);
+	glVertex3f(x[3], y[3], 1.0f);
+	
+	glEnd();	
+	glDepthFunc(GL_LEQUAL);
+}
+
 void D3D_FadeDownScreen(int brightness, int colour)
 {
 	int t, r, g, b, a;
@@ -906,7 +1371,7 @@ void D3D_FadeDownScreen(int brightness, int colour)
 	glVertex3f(x[2], y[2], -1.0f);
 	glVertex3f(x[3], y[3], -1.0f);
 	
-	glEnd();	
+	glEnd();
 }
 
 void D3D_HUD_Setup()
@@ -923,7 +1388,9 @@ void D3D_HUDQuad_Output(int imageNumber, struct VertexTag *quadVerticesPtr, unsi
 	D3DTexture *tex = ImageHeaderArray[imageNumber].D3DTexture;
 	GLfloat x[4], y[4], s[4], t[4];
 	int r, g, b, a;
-	
+
+/* possibly use polygon offset? (predator hud) */
+
 	CheckTranslucencyModeIsCorrect(TRANSLUCENCY_GLOWING);
 	CheckBoundTextureIsCorrect(tex->id);
 	
@@ -931,14 +1398,14 @@ void D3D_HUDQuad_Output(int imageNumber, struct VertexTag *quadVerticesPtr, unsi
 		RecipW = 1.0f / 128.0f;
 	} else {
 		float width = (float) tex->w;
-		RecipW = (1.0f / width);
+		RecipW = 1.0f / width;
 	}
 	
 	if (tex->h == 128) {
 		RecipH = 1.0f / 128.0f;
 	} else {
 		float height = (float) tex->h;
-		RecipH = (1.0f / height);
+		RecipH = 1.0f / height;
 	}
 	
 	b = (colour >> 0)  & 0xFF;
@@ -983,7 +1450,7 @@ void D3D_RenderHUDNumber_Centred(unsigned int number,int x,int y,int colour)
 	int noOfDigits=3;
 	int h = MUL_FIXED(HUDScaleFactor,HUD_DIGITAL_NUMBERS_HEIGHT);
 	int w = MUL_FIXED(HUDScaleFactor,HUD_DIGITAL_NUMBERS_WIDTH);
-	
+
 	quadVertices[0].Y = y;
 	quadVertices[1].Y = y;
 	quadVertices[2].Y = y + h;
@@ -1027,3 +1494,74 @@ void D3D_RenderHUDNumber_Centred(unsigned int number,int x,int y,int colour)
 		
 	} while (--noOfDigits);
 }
+
+void ColourFillBackBuffer(int FillColour)
+{
+	float r, g, b, a;
+	
+	b = ((FillColour >> 0)  & 0xFF) / 255.0f;
+	g = ((FillColour >> 8)  & 0xFF) / 255.0f;
+	r = ((FillColour >> 16) & 0xFF) / 255.0f;
+	a = ((FillColour >> 24) & 0xFF) / 255.0f;
+	
+	glClearColor(r, g, b, a);
+	
+	glClear(GL_COLOR_BUFFER_BIT);
+}
+
+void D3D_DrawBackdrop()
+{
+	extern int NumActiveBlocks;
+	extern DISPLAYBLOCK *ActiveBlockList[];
+	extern MODULE *playerPherModule;
+	
+	PLAYER_STATUS *playerStatusPtr;
+	int numOfObjects = NumActiveBlocks;
+	int needToDrawBackdrop = 0;
+	
+	if (TRIPTASTIC_CHEATMODE||MOTIONBLUR_CHEATMODE)
+		return;
+	
+	if (ShowDebuggingText.Tears) {
+		ColourFillBackBuffer((63<<5));
+		return;
+	}
+	
+	while(numOfObjects--) {
+		DISPLAYBLOCK *objectPtr = ActiveBlockList[numOfObjects];
+		MODULE *modulePtr = objectPtr->ObMyModule;
+		
+		if (modulePtr && (ModuleCurrVisArray[modulePtr->m_index] == 2) && modulePtr->m_flags&MODULEFLAG_SKY) {
+			needToDrawBackdrop = 1;
+			break;
+		}	
+	}
+
+	if (needToDrawBackdrop) {
+		extern BOOL LevelHasStars;
+		extern void RenderSky(void);
+		extern void RenderStarfield(void);
+		
+		ColourFillBackBuffer(0);
+		
+		if (LevelHasStars) {
+			RenderStarfield();
+		} else {
+			RenderSky();
+		}
+		
+		return;
+	}
+	
+	if (!playerPherModule) {
+		ColourFillBackBuffer(0);
+		return;
+	}
+	
+	playerStatusPtr = (PLAYER_STATUS *) (Player->ObStrategyBlock->SBdataptr);
+	
+	if (!playerStatusPtr->IsAlive || FREEFALL_CHEATMODE) {
+		ColourFillBackBuffer(0);
+		return;
+	}
+}
diff --git a/src/stubs.c b/src/stubs.c
index f0359ed..e266874 100644
--- a/src/stubs.c
+++ b/src/stubs.c
@@ -277,11 +277,6 @@ void InitForceField()
 	fprintf(stderr, "InitForceField()\n");
 }
 
-void DrawScanlinesOverlay(float level)
-{
-	fprintf(stderr, "DrawScanlinesOverlay(%f)\n", level);
-}
-
 void RenderString(char *stringPtr, int x, int y, int colour)
 {
 	fprintf(stderr, "RenderString(%s, %d, %d, %d)\n", stringPtr, x, y, colour);
@@ -360,21 +355,6 @@ BOOL EndD3DScene()
 	return FALSE;
 }
 
-void D3D_ZBufferedGouraudPolygon_Output(POLYHEADER *inputPolyPtr,RENDERVERTEX *renderVerticesPtr)
-{
-	fprintf(stderr, "D3D_ZBufferedGouraudPolygon_Output(%p, %p)\n", inputPolyPtr, renderVerticesPtr);
-}
-
-void D3D_ZBufferedCloakedPolygon_Output(POLYHEADER *inputPolyPtr,RENDERVERTEX *renderVerticesPtr)
-{
-	fprintf(stderr, "D3D_ZBufferedCloakedPolygon_Output(%p, %p)\n", inputPolyPtr, renderVerticesPtr);
-}
-
-void D3D_SkyPolygon_Output(POLYHEADER *inputPolyPtr,RENDERVERTEX *renderVerticesPtr)
-{
-	fprintf(stderr, "D3D_SkyPolygon_Output(%p, %p)\n", inputPolyPtr, renderVerticesPtr);
-}
-
 void D3D_DrawWaterTest(MODULE *testModulePtr)
 {
 	fprintf(stderr, "D3D_DrawWaterTest(%p)\n", testModulePtr);
@@ -390,11 +370,6 @@ void D3D_DrawCable(VECTORCH *centrePtr, MATRIXCH *orientationPtr)
 	fprintf(stderr, "D3D_DrawCable(%p, %p)\n", centrePtr, orientationPtr);
 }
 
-void D3D_DrawBackdrop()
-{
-	fprintf(stderr, "D3D_DrawBackdrop()\n");
-}
-
 void D3D_BackdropPolygon_Output(POLYHEADER *inputPolyPtr,RENDERVERTEX *renderVerticesPtr)
 {
 	fprintf(stderr, "D3D_BackdropPolygon_Output(%p, %p)\n", inputPolyPtr, renderVerticesPtr);
@@ -421,11 +396,6 @@ void BlitWin95Char(int x, int y, unsigned char toprint)
 	fprintf(stderr, "BlitWin95Char(%d, %d, %d)\n", x, y, toprint);
 }
 
-void ColourFillBackBuffer(int FillColour)
-{
-	fprintf(stderr, "ColourFillBackBuffer(%d)\n", FillColour);
-}
-
 void LockSurfaceAndGetBufferPointer()
 {
 	fprintf(stderr, "LockSurfaceAndGetBufferPointer()\n");
diff --git a/src/stubs2.cpp b/src/stubs2.cpp
index 35610f2..a68ba99 100644
--- a/src/stubs2.cpp
+++ b/src/stubs2.cpp
@@ -6,15 +6,8 @@
 
 #include "3dc.h"
 #include "platform.h"
-#include "r2base.h"
 #include "indexfnt.hpp"
 
-/* d3d_render.cpp */
-void r2rect::AlphaFill(unsigned char R, unsigned char G, unsigned char B, unsigned char translucency) const
-{
-	fprintf(stderr, "r2rect::AlphaFill(%d, %d, %d, %d)\n", R, G, B, translucency);
-}
-
 /* indexfnt.cpp */
 IndexedFont* IndexedFont :: pIndexedFont[ IndexedFonts_MAX_NUMBER_OF_FONTS ];