Fix sunlight for vid_rendermode 2

wadsrc/static/shaders/scene/lightmode.glsl

@@ -52,12 +52,15 @@ vec4 getLightColor(Material material)
 
 		vec4 dynlight = uDynLightColor;
 
+		float sunlightAttenuation = 0.0;
 		if (vLightmapIndex != -1)
 		{
-			dynlight.rgb += texture(textures[nonuniformEXT(vLightmapIndex)], vLightmap.xy).rgb;
+			vec4 lightmap = texture(textures[nonuniformEXT(vLightmapIndex)], vLightmap.xy);
+			dynlight.rgb += lightmap.rgb;
+			sunlightAttenuation = lightmap.a;
 		}
 
-		dynlight.rgb += ProcessSWLight(material);
+		dynlight.rgb += ProcessSWLight(material, sunlightAttenuation);
 
 		frag.rgb = PickGamePaletteColor(frag.rgb + matColor * dynlight.rgb);
 		return frag;

wadsrc/static/shaders/scene/lightmodel_nolights.glsl

@@ -11,7 +11,7 @@ vec3 ProcessMaterialLight(Material material, vec3 color, float sunlightAttenuati
 	return material.Base.rgb * clamp(color + desaturate(dynlight).rgb, 0.0, 1.4);
 }
 
-vec3 ProcessSWLight(Material material)
+vec3 ProcessSWLight(Material material, float sunlightAttenuation)
 {
 	return vec3(0.0);
 }

wadsrc/static/shaders/scene/lightmodel_normal.glsl

@@ -130,11 +130,17 @@
 		return frag;
 	}
 
-	vec3 ProcessSWLight(Material material)
+	vec3 ProcessSWLight(Material material, float sunlightAttenuation)
 	{
 		vec3 normal = material.Normal;
 		vec3 dynlight = vec3(0.0);
 
+		if (sunlightAttenuation > 0.0)
+		{
+			sunlightAttenuation *= clamp(dot(normal, SunDir), 0.0, 1.0);
+			dynlight.rgb += SunColor.rgb * SunIntensity * sunlightAttenuation;
+		}
+
 		#ifndef UBERSHADER
 			#ifdef SHADE_VERTEX
 				dynlight.rgb += vLightColor;
@@ -171,7 +177,7 @@
 		return material.Base.rgb;
 	}
 
-	vec3 ProcessSWLight(Material material)
+	vec3 ProcessSWLight(Material material, float sunlightAttenuation)
 	{
 		return vec3(0.0);
 	}

wadsrc/static/shaders/scene/lightmodel_pbr.glsl

@@ -224,7 +224,7 @@ vec3 ProcessMaterialLight(Material material, vec3 ambientLight, float sunlightAt
 	return color;
 }
 
-vec3 ProcessSWLight(Material material)
+vec3 ProcessSWLight(Material material, float sunlightAttenuation)
 {
 	return vec3(0.0);
 }

wadsrc/static/shaders/scene/lightmodel_specular.glsl

@@ -127,7 +127,7 @@ vec3 ProcessMaterialLight(Material material, vec3 color, float sunlightAttenuati
 	return frag;
 }
 
-vec3 ProcessSWLight(Material material)
+vec3 ProcessSWLight(Material material, float sunlightAttenuation)
 {
 	return vec3(0.0);
 }

wadsrc/static/shaders/scene/material.glsl

@@ -21,7 +21,7 @@ struct Material
 vec4 Process(vec4 color);
 void SetupMaterial(inout Material mat);
 vec3 ProcessMaterialLight(Material material, vec3 color, float sunlightAttenuation);
-vec3 ProcessSWLight(Material material);
+vec3 ProcessSWLight(Material material, float sunlightAttenuation);
 vec2 GetTexCoord();
 
 Material CreateMaterial()