diff --git a/engine/client/skin.c b/engine/client/skin.c
index 624b205d8..bff4faffb 100644
--- a/engine/client/skin.c
+++ b/engine/client/skin.c
@@ -309,6 +309,9 @@ qbyte	*Skin_Cache8 (skin_t *skin)
 					Q_snprintfz (name, sizeof(name), "%s_pants", skin->name);
 					TEXASSIGN(skin->textures.loweroverlay, R_LoadHiResTexture(name, skinpath, 0));
 
+					if (!TEXVALID(skin->textures.upperoverlay) && !TEXVALID(skin->textures.loweroverlay))
+						Con_DPrintf("skin \"%s\" has no colourmapping info\n", skin->name);
+
 					Q_snprintfz (name, sizeof(name), "%s_luma", skin->name);
 					TEXASSIGN(skin->textures.fullbright, R_LoadHiResTexture(skin->name, skinpath, IF_NOALPHA));
 					Q_snprintfz (name, sizeof(name), "%s_gloss", skin->name);
diff --git a/engine/gl/gl_shader.c b/engine/gl/gl_shader.c
index 7773e42a0..d979362f8 100644
--- a/engine/gl/gl_shader.c
+++ b/engine/gl/gl_shader.c
@@ -1057,6 +1057,8 @@ static qboolean Shader_LoadPermutations(char *name, program_t *prog, char *scrip
 			if (p & (1u<<n))
 				permutationdefines[pn++] = permutationname[n];
 		}
+		if (p & PERMUTATION_UPPERLOWER)
+			permutationdefines[pn++] = "#define UPPER\n#define LOWER\n";
 		if (p & PERMUTATION_BUMPMAP)
 		{
 			if (r_glsl_offsetmapping.ival)
diff --git a/engine/gl/r_bishaders.h b/engine/gl/r_bishaders.h
index dfe49a18a..68de19928 100644
--- a/engine/gl/r_bishaders.h
+++ b/engine/gl/r_bishaders.h
@@ -463,6 +463,7 @@ YOU SHOULD NOT EDIT THIS FILE BY HAND
 "!!permu FRAMEBLEND\n"
 "!!permu SKELETAL\n"
 "!!permu FOG\n"
+"!!permu BUMP\n"
 "!!cvarf r_glsl_offsetmapping_scale\n"
 "!!cvarf gl_specular\n"
 
@@ -470,11 +471,6 @@ YOU SHOULD NOT EDIT THIS FILE BY HAND
 //must support skeletal and 2-way vertex blending or Bad Things Will Happen.
 //the vertex shader is responsible for calculating lighting values.
 
-"#ifdef UPPERLOWER\n"
-"#define UPPER\n"
-"#define LOWER\n"
-"#endif\n"
-
 "varying vec2 tc;\n"
 "varying vec3 light;\n"
 "#if defined(SPECULAR) || defined(OFFSETMAPPING)\n"
@@ -526,8 +522,11 @@ YOU SHOULD NOT EDIT THIS FILE BY HAND
 "uniform sampler2D s_t3;\n"
 "#endif\n"
 
-"#if defined(SPECULAR)\n"
+"#if defined(BUMP)\n"
 "uniform sampler2D s_t4;\n"
+"#endif\n"
+
+"#if defined(SPECULAR)\n"
 "uniform sampler2D s_t5;\n"
 "uniform float cvar_gl_specular;\n"
 "#endif\n"
@@ -544,7 +543,7 @@ YOU SHOULD NOT EDIT THIS FILE BY HAND
 "vec4 col, sp;\n"
 
 "#ifdef OFFSETMAPPING\n"
-"vec2 tcoffsetmap = offsetmap(s_t1, tcbase, eyevector);\n"
+"vec2 tcoffsetmap = offsetmap(s_t4, tcbase, eyevector);\n"
 "#define tc tcoffsetmap\n"
 "#endif\n"
 
@@ -559,7 +558,7 @@ YOU SHOULD NOT EDIT THIS FILE BY HAND
 "#endif\n"
 "col.rgb *= light;\n"
 
-"#if defined(SPECULAR)\n"
+"#if defined(BUMP) && defined(SPECULAR)\n"
 "vec3 bumps = normalize(vec3(texture2D(s_t4, tc)) - 0.5);\n"
 "vec4 specs = texture2D(s_t5, tc);\n"
 
@@ -570,7 +569,8 @@ YOU SHOULD NOT EDIT THIS FILE BY HAND
 
 "#ifdef FULLBRIGHT\n"
 "vec4 fb = texture2D(s_t3, tc);\n"
-"col.rgb = mix(col.rgb, fb.rgb, fb.a);\n"
+//	col.rgb = mix(col.rgb, fb.rgb, fb.a);
+"col.rgb += fb.rgb * fb.a;\n"
 "#endif\n"
 
 "gl_FragColor = fog4(col * e_colourident);\n"
diff --git a/engine/shaders/glsl/defaultskin.glsl b/engine/shaders/glsl/defaultskin.glsl
index fb91484c4..c927c0c61 100644
--- a/engine/shaders/glsl/defaultskin.glsl
+++ b/engine/shaders/glsl/defaultskin.glsl
@@ -3,6 +3,7 @@
 !!permu FRAMEBLEND
 !!permu SKELETAL
 !!permu FOG
+!!permu BUMP
 !!cvarf r_glsl_offsetmapping_scale
 !!cvarf gl_specular
 
@@ -10,11 +11,6 @@
 //must support skeletal and 2-way vertex blending or Bad Things Will Happen.
 //the vertex shader is responsible for calculating lighting values.
 
-#ifdef UPPERLOWER
-#define UPPER
-#define LOWER
-#endif
-
 varying vec2 tc;
 varying vec3 light;
 #if defined(SPECULAR) || defined(OFFSETMAPPING)
@@ -66,8 +62,11 @@ uniform vec3 e_uppercolour;
 uniform sampler2D s_t3;
 #endif
 
-#if defined(SPECULAR)
+#if defined(BUMP)
 uniform sampler2D s_t4;
+#endif
+
+#if defined(SPECULAR)
 uniform sampler2D s_t5;
 uniform float cvar_gl_specular;
 #endif
@@ -84,7 +83,7 @@ void main ()
 	vec4 col, sp;
 
 #ifdef OFFSETMAPPING
-	vec2 tcoffsetmap = offsetmap(s_t1, tcbase, eyevector);
+	vec2 tcoffsetmap = offsetmap(s_t4, tcbase, eyevector);
 #define tc tcoffsetmap
 #endif
 
@@ -99,7 +98,7 @@ void main ()
 #endif
 	col.rgb *= light;
 
-#if defined(SPECULAR)
+#if defined(BUMP) && defined(SPECULAR)
 	vec3 bumps = normalize(vec3(texture2D(s_t4, tc)) - 0.5);
 	vec4 specs = texture2D(s_t5, tc);
 
@@ -110,7 +109,8 @@ void main ()
 
 #ifdef FULLBRIGHT
 	vec4 fb = texture2D(s_t3, tc);
-	col.rgb = mix(col.rgb, fb.rgb, fb.a);
+//	col.rgb = mix(col.rgb, fb.rgb, fb.a);
+	col.rgb += fb.rgb * fb.a;
 #endif
 
 	gl_FragColor = fog4(col * e_colourident);