diff --git a/ref/null/r_context.c b/ref/null/r_context.c
index fe887050..c9a7ad69 100644
--- a/ref/null/r_context.c
+++ b/ref/null/r_context.c
@@ -34,17 +34,17 @@ static void R_SimpleStub( void )
 	;
 }
 
-static void R_SimpleStubInt( int )
+static void R_SimpleStubInt( int unused )
 {
 	;
 }
 
-static void R_SimpleStubUInt( unsigned int )
+static void R_SimpleStubUInt( unsigned int unused )
 {
 	;
 }
 
-static void R_SimpleStubBool( qboolean )
+static void R_SimpleStubBool( qboolean unused )
 {
 	;
 }
@@ -100,7 +100,7 @@ static void GL_ProcessTexture( int texnum, float gamma, int topColor, int bottom
 	;
 }
 
-static void R_SetupSky( const char *skyname )
+static void R_SetupSky( int *skytextures )
 {
 	;
 }
@@ -167,7 +167,7 @@ static void R_StudioLerpMovement( cl_entity_t *e, double time, vec3_t origin, ve
 	;
 }
 
-static void R_InitSkyClouds( struct mip_s *mt, struct texture_s *tx, qboolean custom_palette )
+static void R_SetSkyCloudsTextures( int solidskyTexture, int alphaskyTexture )
 {
 	;
 }
@@ -295,6 +295,11 @@ static int GL_CreateTextureArray( const char *name, int width, int height, int d
 	return 0;
 }
 
+static void R_OverrideTextureSourceSize( unsigned int textnum, unsigned int srcWidth, unsigned int srcHeight )
+{
+
+}
+
 static void DrawSingleDecal( struct decal_s *pDecal, struct msurface_s *fa )
 {
 	;
@@ -426,46 +431,16 @@ static void CullFace( TRICULLSTYLE mode )
 	;
 }
 
-static void VGUI_SetupDrawing( int *pColor )
+static void VGUI_SetupDrawing( qboolean rect )
 {
 	;
 }
 
-static void VGUI_EnableTexture( qboolean enable )
+static void VGUI_UploadTextureBlock( int drawX, int drawY, const byte *rgba, int blockWidth, int blockHeight )
 {
 	;
 }
 
-static void VGUI_CreateTexture( int id, int width, int height )
-{
-	;
-}
-
-static void VGUI_UploadTexture( int id, const char *buffer, int width, int height )
-{
-	;
-}
-
-static void VGUI_UploadTextureBlock( int id, int drawX, int drawY, const byte *rgba, int blockWidth, int blockHeight )
-{
-	;
-}
-
-static void VGUI_DrawQuad( const vpoint_t *ul, const vpoint_t *lr )
-{
-	;
-}
-
-static void VGUI_GetTextureSizes( int *width, int *height )
-{
-	*width = *height = 0;
-}
-
-static int VGUI_GenerateTexture( void )
-{
-	return 0;
-}
-
 static ref_interface_t gReffuncs =
 {
 	.R_Init                = R_Init,
@@ -524,7 +499,7 @@ static ref_interface_t gReffuncs =
 	.R_StudioLerpMovement  = R_StudioLerpMovement,
 	.CL_InitStudioAPI      = R_SimpleStub,
 
-	.R_InitSkyClouds     = R_InitSkyClouds,
+	.R_SetSkyCloudsTextures     = R_SetSkyCloudsTextures,
 	.GL_SubdivideSurface = GL_SubdivideSurface,
 	.CL_RunLightStyles   = R_SimpleStub,
 
@@ -556,6 +531,7 @@ static ref_interface_t gReffuncs =
 	.GL_LoadTextureArray   = GL_LoadTextureArray,
 	.GL_CreateTextureArray = GL_CreateTextureArray,
 	.GL_FreeTexture        = R_SimpleStubUInt,
+	.R_OverrideTextureSourceSize = R_OverrideTextureSourceSize,
 
 	.DrawSingleDecal      = DrawSingleDecal,
 	.R_DecalSetupVerts    = R_DecalSetupVerts,
@@ -601,19 +577,8 @@ static ref_interface_t gReffuncs =
 	.FogParams     = FogParams,
 	.CullFace      = CullFace,
 
-	.VGUI_DrawInit           = R_SimpleStub,
-	.VGUI_DrawShutdown       = R_SimpleStub,
-	.VGUI_SetupDrawingText   = VGUI_SetupDrawing,
-	.VGUI_SetupDrawingRect   = VGUI_SetupDrawing,
-	.VGUI_SetupDrawingImage  = VGUI_SetupDrawing,
-	.VGUI_BindTexture        = R_SimpleStubInt,
-	.VGUI_EnableTexture      = VGUI_EnableTexture,
-	.VGUI_CreateTexture      = VGUI_CreateTexture,
-	.VGUI_UploadTexture      = VGUI_UploadTexture,
+	.VGUI_SetupDrawing   = VGUI_SetupDrawing,
 	.VGUI_UploadTextureBlock = VGUI_UploadTextureBlock,
-	.VGUI_DrawQuad           = VGUI_DrawQuad,
-	.VGUI_GetTextureSizes    = VGUI_GetTextureSizes,
-	.VGUI_GenerateTexture    = VGUI_GenerateTexture,
 };
 
 int EXPORT GetRefAPI( int version, ref_interface_t *funcs, ref_api_t *engfuncs, ref_globals_t *globals );