1.2 update, w/ GZDoom 4.9 stuff:

- Customizable player skins here too.
 - Integrated re-skin add-ons ("Old Sounds" is still separate).
 - The usual fixes and optimizations.
 - All weapons are now left-handed, where possible.

shaders/glsl/MeshEnviroMapMasked_AmbientGlow.fp

@@ -1,6 +1,13 @@
 // imitation of the Unreal Engine 1.x ambient glow effect
 vec4 ProcessLight( vec4 color )
 {
+	vec2 gs = texture(ambglow,vec2(.5)).xy;
+	if ( gs.x > .5 ) return color;
+	if ( gs.y > .5 )
+	{
+		float glow = max(0.,sin(timer*4)-.5);
+		return vec4(min(color.rgb+vec3(glow),1.),color.a);
+	}
 	float glow = 0.25+0.2*sin(timer*8);
 	return vec4(min(color.rgb+vec3(glow),1.0),color.a);
 }
@@ -13,5 +20,13 @@ vec4 ProcessTexel()
 	float mask = texture(masktex,vTexCoord.st).x;
 	vec3 eyedir = normalize(uCameraPos.xyz-pixelpos.xyz);
 	vec3 norm = reflect(eyedir,normalize(vWorldNormal.xyz));
+	vec2 gs = texture(ambglow,vec2(.5)).xy;
+	if ( gs.x > .5 ) return vec4(base.rgb+texture(envtex,norm.xz*0.5+0.5).rgb*mask,base.a);
+	if ( gs.y > .5 )
+	{
+		float glow = max(0.,sin(timer*4)-.5);
+		vec3 col = base.rgb+texture(envtex,norm.xz*0.5+0.5).rgb*mask;
+		return vec4(min(col+vec3(glow),1.),base.a);
+	}
 	return vec4(base.rgb+texture(envtex,norm.xz*0.5+0.5).rgb*mask,base.a);
 }