* s/GL_CLAMP/GL_CLAMP_TO_EDGE/g (If this change appears to cause you problems

and you're using an nVidia graphics card, make sure your 'conformant texture
  clamp' setting is set to on for ioq3)

code/renderer/tr_backend.c

@@ -776,8 +776,8 @@ void RE_StretchRaw (int x, int y, int w, int h, int cols, int rows, const byte *
 		qglTexImage2D( GL_TEXTURE_2D, 0, GL_RGB8, cols, rows, 0, GL_RGBA, GL_UNSIGNED_BYTE, data );
 		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
-		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
-		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );	
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );	
 	} else {
 		if (dirty) {
 			// otherwise, just subimage upload it so that drivers can tell we are going to be changing
@@ -818,8 +818,8 @@ void RE_UploadCinematic (int w, int h, int cols, int rows, const byte *data, int
 		qglTexImage2D( GL_TEXTURE_2D, 0, GL_RGB8, cols, rows, 0, GL_RGBA, GL_UNSIGNED_BYTE, data );
 		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
-		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
-		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );	
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );	
 	} else {
 		if (dirty) {
 			// otherwise, just subimage upload it so that drivers can tell we are going to be changing

code/renderer/tr_bsp.c

@@ -205,7 +205,7 @@ static	void R_LoadLightmaps( lump_t *l ) {
 			}
 		}
 		tr.lightmaps[i] = R_CreateImage( va("*lightmap%d",i), image, 
-			LIGHTMAP_SIZE, LIGHTMAP_SIZE, qfalse, qfalse, GL_CLAMP );
+			LIGHTMAP_SIZE, LIGHTMAP_SIZE, qfalse, qfalse, GL_CLAMP_TO_EDGE );
 	}
 
 	if ( r_lightmap->integer == 2 )	{

code/renderer/tr_font.c

@@ -493,7 +493,7 @@ void RE_RegisterFont(const char *fontName, int pointSize, fontInfo_t *font) {
 			}
 
     	//Com_sprintf (name, sizeof(name), "fonts/fontImage_%i_%i", imageNumber++, pointSize);
-      image = R_CreateImage(name, imageBuff, 256, 256, qfalse, qfalse, GL_CLAMP);
+      image = R_CreateImage(name, imageBuff, 256, 256, qfalse, qfalse, GL_CLAMP_TO_EDGE);
       h = RE_RegisterShaderFromImage(name, LIGHTMAP_2D, image, qfalse);
       for (j = lastStart; j < i; j++) {
         font->glyphs[j].glyph = h;

code/renderer/tr_image.c

@@ -199,7 +199,7 @@ void R_ImageList_f( void ) {
 		case GL_REPEAT:
 			ri.Printf( PRINT_ALL, "rept " );
 			break;
-		case GL_CLAMP:
+		case GL_CLAMP_TO_EDGE:
 			ri.Printf( PRINT_ALL, "clmp " );
 			break;
 		default:
@@ -1004,7 +1004,7 @@ static void R_CreateDlightImage( void ) {
 			data[y][x][3] = 255;			
 		}
 	}
-	tr.dlightImage = R_CreateImage("*dlight", (byte *)data, DLIGHT_SIZE, DLIGHT_SIZE, qfalse, qfalse, GL_CLAMP );
+	tr.dlightImage = R_CreateImage("*dlight", (byte *)data, DLIGHT_SIZE, DLIGHT_SIZE, qfalse, qfalse, GL_CLAMP_TO_EDGE );
 }
 
 
@@ -1094,7 +1094,7 @@ static void R_CreateFogImage( void ) {
 	// standard openGL clamping doesn't really do what we want -- it includes
 	// the border color at the edges.  OpenGL 1.2 has clamp-to-edge, which does
 	// what we want.
-	tr.fogImage = R_CreateImage("*fog", (byte *)data, FOG_S, FOG_T, qfalse, qfalse, GL_CLAMP );
+	tr.fogImage = R_CreateImage("*fog", (byte *)data, FOG_S, FOG_T, qfalse, qfalse, GL_CLAMP_TO_EDGE );
 	ri.Hunk_FreeTempMemory( data );
 
 	borderColor[0] = 1.0;
@@ -1172,7 +1172,7 @@ void R_CreateBuiltinImages( void ) {
 
 	for(x=0;x<32;x++) {
 		// scratchimage is usually used for cinematic drawing
-		tr.scratchImage[x] = R_CreateImage("*scratch", (byte *)data, DEFAULT_SIZE, DEFAULT_SIZE, qfalse, qtrue, GL_CLAMP );
+		tr.scratchImage[x] = R_CreateImage("*scratch", (byte *)data, DEFAULT_SIZE, DEFAULT_SIZE, qfalse, qtrue, GL_CLAMP_TO_EDGE );
 	}
 
 	R_CreateDlightImage();

code/renderer/tr_local.h

@@ -103,7 +103,7 @@ typedef struct image_s {
 
 	qboolean	mipmap;
 	qboolean	allowPicmip;
-	int			wrapClampMode;		// GL_CLAMP or GL_REPEAT
+	int			wrapClampMode;		// GL_CLAMP_TO_EDGE or GL_REPEAT
 
 	struct image_s*	next;
 } image_t;

code/renderer/tr_shader.c

@@ -657,7 +657,7 @@ static qboolean ParseStage( shaderStage_t *stage, char **text )
 				return qfalse;
 			}
 
-			stage->bundle[0].image[0] = R_FindImageFile( token, !shader.noMipMaps, !shader.noPicMip, GL_CLAMP );
+			stage->bundle[0].image[0] = R_FindImageFile( token, !shader.noMipMaps, !shader.noPicMip, GL_CLAMP_TO_EDGE );
 			if ( !stage->bundle[0].image[0] )
 			{
 				ri.Printf( PRINT_WARNING, "WARNING: R_FindImageFile could not find '%s' in shader '%s'\n", token, shader.name );
@@ -1230,11 +1230,8 @@ static void ParseSkyParms( char **text ) {
 		for (i=0 ; i<6 ; i++) {
 			Com_sprintf( pathname, sizeof(pathname), "%s_%s.tga"
 				, token, suf[i] );
-#ifdef GL_CLAMP_TO_EDGE
 			shader.sky.outerbox[i] = R_FindImageFile( ( char * ) pathname, qtrue, qtrue, GL_CLAMP_TO_EDGE );
-#else
+
-			shader.sky.outerbox[i] = R_FindImageFile( ( char * ) pathname, qtrue, qtrue, GL_CLAMP );
-#endif
 			if ( !shader.sky.outerbox[i] ) {
 				shader.sky.outerbox[i] = tr.defaultImage;
 			}
@@ -2516,7 +2513,7 @@ shader_t *R_FindShader( const char *name, int lightmapIndex, qboolean mipRawImag
 	// if not defined in the in-memory shader descriptions,
 	// look for a single supported image file
 	//
-	image = R_FindImageFile( name, mipRawImage, mipRawImage, mipRawImage ? GL_REPEAT : GL_CLAMP );
+	image = R_FindImageFile( name, mipRawImage, mipRawImage, mipRawImage ? GL_REPEAT : GL_CLAMP_TO_EDGE );
 	if ( !image ) {
 		ri.Printf( PRINT_DEVELOPER, "Couldn't find image file for shader %s\n", name );
 		shader.defaultShader = qtrue;