diff --git a/source/src/rendercubes.cpp b/source/src/rendercubes.cpp
index 9158acdb..5f86dde8 100644
--- a/source/src/rendercubes.cpp
+++ b/source/src/rendercubes.cpp
@@ -472,20 +472,20 @@ void setupmultitexrefract(GLuint reflecttex, GLuint refracttex)
 
 void setupmultitexreflect(GLuint reflecttex)
 {
-    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
-    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB,  GL_INTERPOLATE_ARB);
-    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB,  GL_TEXTURE);
-    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);
-    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB,  GL_CONSTANT_ARB);
-    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);
-    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB,  GL_PRIMARY_COLOR_ARB);
-    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);
+    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
+    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT,  GL_INTERPOLATE_EXT);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT,  GL_TEXTURE);
+    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_EXT, GL_SRC_COLOR);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT,  GL_CONSTANT_EXT);
+    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_EXT, GL_SRC_COLOR);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_EXT,  GL_PRIMARY_COLOR_EXT);
+    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_EXT, GL_SRC_ALPHA);
 
-    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB,  GL_MODULATE);
-    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB,  GL_CONSTANT_ARB);
-    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);
-    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB,  GL_PREVIOUS_ARB);
-    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_ONE_MINUS_SRC_ALPHA);
+    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_EXT,  GL_MODULATE);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_EXT,  GL_CONSTANT_EXT);
+    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_EXT, GL_SRC_ALPHA);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_EXT,  GL_PREVIOUS_EXT);
+    glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_EXT, GL_ONE_MINUS_SRC_ALPHA);
     
     float a = hdr.watercolor[3]/255.0f;
     float wc[4] = { hdr.watercolor[0]/255.0f*a, hdr.watercolor[1]/255.0f*a, hdr.watercolor[2]/255.0f*a, 1.0f-a };
@@ -501,7 +501,11 @@ void cleanupmultitex(GLuint reflecttex, GLuint refracttex)
         glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);
         glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);
     }
-    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
+    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT, GL_MODULATE);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT, GL_TEXTURE);
+    glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT, GL_PRIMARY_COLOR_EXT);
+
     glLoadIdentity();
     
     glActiveTexture_(GL_TEXTURE1_ARB);