Index: twilight/src/renderer/alias.c
diff -u twilight/src/renderer/alias.c:1.3 twilight/src/renderer/alias.c:1.4
--- twilight/src/renderer/alias.c:1.3	Sat Dec 20 19:06:23 2003
+++ twilight/src/renderer/alias.c	Tue Aug 16 23:30:04 2005
@@ -23,7 +23,7 @@
 
 */
 static const char rcsid[] =
-	"$Id: alias.c,v 1.3 2003/12/21 00:06:23 warp Exp $";
+	"$Id: alias.c,v 1.4 2005/08/17 03:30:04 warp Exp $";
 
 #include "twiconfig.h"
 
@@ -455,7 +455,7 @@
 	qglEnableClientState (GL_COLOR_ARRAY);
 	qglBlendFunc (GL_ONE, GL_ONE);
 
-	if (gl_nv_register_combiners) {
+	if (gl_nv_register_combiners && gl_mtex) {
 		qglEnable (GL_REGISTER_COMBINERS_NV);
 
 		qglCombinerInputNV (GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE0_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);