Add sunlight/lightmap merging by multiply (r_sunlightMode 1) Merge additive sunlight and map lighting into one GLSL shader (r_sunlightMode 2) Change single lightmap blends to use lightall

8 files changed, 195 insertions, 306 deletions

diff --git a/src/renderergl2/glsl/lightall_fp.glsl b/src/renderergl2/glsl/lightall_fp.glsl
index ec9bb2dc..10f99946 100644
--- a/src/renderergl2/glsl/lightall_fp.glsl
+++ b/src/renderergl2/glsl/lightall_fp.glsl
@@ -27,11 +27,19 @@ uniform int    u_TCGen0;
 #endif
 
 #if defined(USE_LIGHT_VECTOR)
+uniform vec4      u_LightOrigin;
 uniform vec3      u_DirectedLight;
 uniform vec3      u_AmbientLight;
 uniform float     u_LightRadius;
 #endif
 
+#if defined(USE_PRIMARY_LIGHT) || defined(USE_SHADOWMAP)
+uniform vec3  u_PrimaryLightColor;
+uniform vec3  u_PrimaryLightAmbient;
+uniform float u_PrimaryLightRadius;
+#endif
+
+
 #if defined(USE_LIGHT)
 uniform vec2      u_MaterialInfo;
 #endif
@@ -62,9 +70,14 @@ varying vec3      var_Bitangent;
 varying vec3      var_VertLight;
 
 #if defined(USE_LIGHT) && !defined(USE_DELUXEMAP)
-varying vec3      var_WorldLight;
+varying vec3      var_LightDirection;
+#endif
+
+#if defined(USE_PRIMARY_LIGHT) || defined(USE_SHADOWMAP)
+varying vec3      var_PrimaryLightDirection;
 #endif
 
+
 #define EPSILON 0.00000001
 
 #if defined(USE_PARALLAXMAP)
@@ -199,14 +212,14 @@ float CalcSpecular(float NH, float NL, float NE, float EH, float fzero, float sh
 void main()
 {
 #if !defined(USE_FAST_LIGHT) && (defined(USE_LIGHT) || defined(USE_NORMALMAP))
-	vec3 surfNormal = normalize(var_Normal);
+	vec3 surfN = normalize(var_Normal);
 #endif
 
 #if defined(USE_DELUXEMAP)
-	vec3 worldLight = 2.0 * texture2D(u_DeluxeMap, var_LightTex).xyz - vec3(1.0);
-	//worldLight += var_WorldLight * 0.0001;
+	vec3 L = 2.0 * texture2D(u_DeluxeMap, var_LightTex).xyz - vec3(1.0);
+	//L += var_LightDirection * 0.0001;
 #elif defined(USE_LIGHT)
-	vec3 worldLight = var_WorldLight;
+	vec3 L = var_LightDirection;
 #endif
 
 #if defined(USE_LIGHTMAP)
@@ -214,101 +227,110 @@ void main()
   #if defined(RGBE_LIGHTMAP)
 	lightSample.rgb *= exp2(lightSample.a * 255.0 - 128.0);
   #endif
-	vec3 directedLight = lightSample.rgb;
+	vec3 lightColor = lightSample.rgb;
 #elif defined(USE_LIGHT_VECTOR) && !defined(USE_FAST_LIGHT)
   #if defined(USE_INVSQRLIGHT)
-	float intensity = 1.0 / dot(worldLight, worldLight);
+	float intensity = 1.0 / dot(L, L);
   #else
-	float intensity = clamp((1.0 - dot(worldLight, worldLight) / (u_LightRadius * u_LightRadius)) * 1.07, 0.0, 1.0);
+	float intensity = clamp((1.0 - dot(L, L) / (u_LightRadius * u_LightRadius)) * 1.07, 0.0, 1.0);
   #endif
 
-	vec3 directedLight = u_DirectedLight * intensity;
-	vec3 ambientLight  = u_AmbientLight;
-
-  #if defined(USE_SHADOWMAP)
-	vec2 shadowTex = gl_FragCoord.xy * r_FBufScale;
-	directedLight *= texture2D(u_ShadowMap, shadowTex).r;
-  #endif
+	vec3 lightColor = u_DirectedLight * intensity;
+	vec3 ambientColor  = u_AmbientLight;
 #elif defined(USE_LIGHT_VERTEX) && !defined(USE_FAST_LIGHT)
-	vec3 directedLight = var_VertLight;
+	vec3 lightColor = var_VertLight;
 #endif
 	
 #if defined(USE_TCGEN) || defined(USE_NORMALMAP) || (defined(USE_LIGHT) && !defined(USE_FAST_LIGHT))
-	vec3 SampleToView = normalize(var_SampleToView);
+	vec3 E = normalize(var_SampleToView);
 #endif
-	vec2 tex = var_DiffuseTex;
+	vec2 texCoords = var_DiffuseTex;
 
 	float ambientDiff = 1.0;
 
 #if defined(USE_NORMALMAP)
   #if defined(USE_VERT_TANGENT_SPACE)
-    vec3   tangent = var_Tangent;
-	vec3 bitangent = var_Bitangent;
+	mat3 tangentToWorld = mat3(var_Tangent, var_Bitangent, var_Normal);
   #else
 	vec3 q0  = dFdx(var_Position);
 	vec3 q1  = dFdy(var_Position);
-	vec2 st0 = dFdx(tex);
-	vec2 st1 = dFdy(tex);
+	vec2 st0 = dFdx(texCoords);
+	vec2 st1 = dFdy(texCoords);
 	float dir = sign(st1.t * st0.s - st0.t * st1.s);
 
-	vec3   tangent = normalize( q0 * st1.t - q1 * st0.t) * dir;
-	vec3 bitangent = -normalize( q0 * st1.s - q1 * st0.s) * dir;
-  #endif
+	vec3   tangent =  normalize(q0 * st1.t - q1 * st0.t) * dir;
+	vec3 bitangent = -normalize(q0 * st1.s - q1 * st0.s) * dir;
 
 	mat3 tangentToWorld = mat3(tangent, bitangent, var_Normal);
+  #endif
 
   #if defined(USE_PARALLAXMAP)
-	vec3 offsetDir = normalize(SampleToView * tangentToWorld);
-    #if 0
-    float height = SampleHeight(u_NormalMap, tex);
-	float pdist = 0.05 * height - (0.05 / 2.0);
-    #else
+	vec3 offsetDir = normalize(E * tangentToWorld);
 	offsetDir.xy *= -0.05 / offsetDir.z;
-	float pdist = RayIntersectDisplaceMap(tex, offsetDir.xy, u_NormalMap);
-    #endif	
-	tex += offsetDir.xy * pdist;
+
+	texCoords += offsetDir.xy * RayIntersectDisplaceMap(texCoords, offsetDir.xy, u_NormalMap);
   #endif
+	vec3 texN;
   #if defined(SWIZZLE_NORMALMAP)
-	vec3 normal = 2.0 * texture2D(u_NormalMap, tex).agb - 1.0;
+	texN.xy = 2.0 * texture2D(u_NormalMap, texCoords).ag - 1.0;
   #else
-	vec3 normal = 2.0 * texture2D(u_NormalMap, tex).rgb - 1.0;
+	texN.xy = 2.0 * texture2D(u_NormalMap, texCoords).rg - 1.0;
   #endif
-	normal.z = sqrt(clamp(1.0 - dot(normal.xy, normal.xy), 0.0, 1.0));
-	vec3 worldNormal = tangentToWorld * normal;
+	texN.z = sqrt(clamp(1.0 - dot(texN.xy, texN.xy), 0.0, 1.0));
+	vec3 N = tangentToWorld * texN;
   #if defined(r_normalAmbient)
-	ambientDiff = 0.781341 * normal.z + 0.218659;
+	ambientDiff = 0.781341 * texN.z + 0.218659;
   #endif
-#elif defined(USE_LIGHT) && !defined(USE_FAST_LIGHT)
-	vec3 worldNormal = surfNormal;
+#elif defined(USE_LIGHT) && !defined(USE_FAST_LIGHT) 
+	vec3 N = surfN;
 #endif
 
 #if (defined(USE_LIGHT) && !defined(USE_FAST_LIGHT)) || (defined(USE_TCGEN) && defined(USE_NORMALMAP))
-	worldNormal = normalize(worldNormal);
+	N = normalize(N);
 #endif
 
 #if defined(USE_TCGEN) && defined(USE_NORMALMAP)
 	if (u_TCGen0 == TCGEN_ENVIRONMENT_MAPPED)
 	{
-		tex = -reflect(normalize(SampleToView), worldNormal).yz * vec2(0.5, -0.5) + 0.5;
+		texCoords = -reflect(E, N).yz * vec2(0.5, -0.5) + 0.5;
 	}
 #endif
 
-	vec4 diffuse = texture2D(u_DiffuseMap, tex);
+	vec4 diffuse = texture2D(u_DiffuseMap, texCoords);
 
 #if defined(USE_LIGHT) && defined(USE_FAST_LIGHT)
   #if defined(USE_LIGHTMAP)
-	diffuse.rgb *= directedLight;
+	diffuse.rgb *= lightColor;
   #endif
 #elif defined(USE_LIGHT)
-	worldLight = normalize(worldLight);
+	L = normalize(L);
 
-	float surfNL = clamp(dot(surfNormal,  worldLight),   0.0, 1.0);
+	float surfNL = clamp(dot(surfN,  L),   0.0, 1.0);
+	
+  #if defined(USE_SHADOWMAP) 
+	vec2 shadowTex = gl_FragCoord.xy * r_FBufScale;
+	float shadowValue = texture2D(u_ShadowMap, shadowTex).r;
+
+	// surfaces not facing the light are always shadowed
+	shadowValue *= step(0.0, dot(surfN, var_PrimaryLightDirection));
+  
+    #if defined(SHADOWMAP_MODULATE)
+	//vec3 shadowColor = min(u_PrimaryLightAmbient, lightColor);
+	vec3 shadowColor = u_PrimaryLightAmbient * lightColor;
+		
+      #if 0
+	// Only shadow when the world light is parallel to the primary light
+	shadowValue = 1.0 + (shadowValue - 1.0) * clamp(dot(L, var_PrimaryLightDirection), 0.0, 1.0);
+	  #endif
+	lightColor = mix(shadowColor, lightColor, shadowValue);
+	#endif
+  #endif
 
   #if defined(USE_LIGHTMAP) || defined(USE_LIGHT_VERTEX)
     #if defined(USE_STANDARD_DELUXEMAP)
 	// Standard deluxe mapping treats the light sample as fully directed
 	// and doesn't compensate for light angle attenuation.
-	vec3 ambientLight = vec3(0.0);
+	vec3 ambientColor = vec3(0.0);
     #else
 	// Separate the light sample into directed and ambient parts.
 	//
@@ -332,45 +354,71 @@ void main()
       #endif
 
 	// Recover any unused light as ambient
-	vec3 ambientLight = directedLight;
-	directedLight *= directedScale;
-	ambientLight -= directedLight * surfNL;
+	vec3 ambientColor = lightColor;
+	lightColor *= directedScale;
+	ambientColor -= lightColor * surfNL;
     #endif
   #endif
-	
-	float NL = clamp(dot(worldNormal,  worldLight),   0.0, 1.0);
-	float NE = clamp(dot(worldNormal,  SampleToView), 0.0, 1.0);
+
+	float NL = clamp(dot(N, L), 0.0, 1.0);
+	float NE = clamp(dot(N, E), 0.0, 1.0);
 
 	float fzero = u_MaterialInfo.x;
 	float shininess = u_MaterialInfo.y;
 
   #if defined(USE_SPECULARMAP)
-	vec4 specular = texture2D(u_SpecularMap, tex);
+	vec4 specular = texture2D(u_SpecularMap, texCoords);
 	//specular.rgb = clamp(specular.rgb - diffuse.rgb, 0.0, 1.0);
 	shininess *= specular.a;
   #endif
 
-	float directedDiff = NL * CalcDiffuse(worldNormal, worldLight, SampleToView, NE, NL, fzero, shininess);
-	diffuse.rgb *= directedLight * directedDiff + ambientDiff * ambientLight;
+	float diffuseIntensity = NL * CalcDiffuse(N, L, E, NE, NL, fzero, shininess);
+  #if defined(USE_PRIMARY_LIGHT)
+	vec3 L2 = var_PrimaryLightDirection;
+	
+	float NL2 = clamp(dot(N, L2), 0.0, 1.0);
+	float diffuseIntensity2 = NL2 * CalcDiffuse(N, L2, E, NE, NL2, fzero, shininess);
+    #if defined(USE_SHADOWMAP)
+	diffuseIntensity2 *= shadowValue;
+	#endif
+	
+	diffuse.rgb *= lightColor * diffuseIntensity + u_PrimaryLightColor * diffuseIntensity2 + ambientDiff * ambientColor;
+  #else
+	diffuse.rgb *= lightColor * diffuseIntensity + ambientDiff * ambientColor;
+  #endif
   
   #if defined(USE_SPECULARMAP)
-	vec3 halfAngle = normalize(worldLight + SampleToView);
+	vec3 H = normalize(L + E);
 
-	float EH = clamp(dot(SampleToView, halfAngle), 0.0, 1.0);
-	float NH = clamp(dot(worldNormal,  halfAngle), 0.0, 1.0);
+	float EH = clamp(dot(E, H), 0.0, 1.0);
+	float NH = clamp(dot(N, H), 0.0, 1.0);
 
-	float directedSpec = NL * CalcSpecular(NH, NL, NE, EH, fzero, shininess);
+	float specularIntensity = NL * CalcSpecular(NH, NL, NE, EH, fzero, shininess);
   
     #if defined(r_normalAmbient)
-	vec3 ambientHalf = normalize(surfNormal + SampleToView);
-	float ambientSpec = max(dot(ambientHalf, worldNormal) + 0.5, 0.0);
+	vec3 ambientHalf = normalize(surfN + E);
+	float ambientSpec = max(dot(ambientHalf, N) + 0.5, 0.0);
 	ambientSpec *= ambientSpec * 0.44;
 	ambientSpec = pow(ambientSpec, shininess) * fzero;
-	specular.rgb *= directedSpec * directedLight + ambientSpec * ambientLight;
-    #else
-	specular.rgb *= directedSpec * directedLight;
-    #endif
-  #endif
+	#else
+	float ambientSpec = 0.0;
+	#endif
+	#if defined(USE_PRIMARY_LIGHT)
+	vec3 H2 = normalize(L2 + E);
+	float EH2 = clamp(dot(E, H2), 0.0, 1.0);
+	float NH2 = clamp(dot(N, H2), 0.0, 1.0);
+
+	float specularIntensity2 = NL * CalcSpecular(NH2, NL2, NE, EH2, fzero, shininess);
+
+      #if defined(USE_SHADOWMAP)
+	specularIntensity2 *= shadowValue;
+      #endif
+	
+	specular.rgb *= specularIntensity * lightColor + specularIntensity2 * u_PrimaryLightColor + ambientSpec * ambientColor;
+	#else
+	specular.rgb *= specularIntensity * lightColor + ambientSpec * ambientColor;
+	#endif
+  #endif  
 #endif
 
 	gl_FragColor = diffuse;
diff --git a/src/renderergl2/glsl/lightall_vp.glsl b/src/renderergl2/glsl/lightall_vp.glsl
index 4604b6ed..03775caf 100644
--- a/src/renderergl2/glsl/lightall_vp.glsl
+++ b/src/renderergl2/glsl/lightall_vp.glsl
@@ -61,6 +61,10 @@ uniform float  u_LightRadius;
   #endif
 #endif
 
+#if defined(USE_PRIMARY_LIGHT) || defined(USE_SHADOWMAP)
+uniform vec4  u_PrimaryLightOrigin;
+#endif
+
 varying vec2   var_DiffuseTex;
 
 #if defined(USE_LIGHTMAP)
@@ -91,7 +95,11 @@ varying vec3   var_VertLight;
 #endif
 
 #if defined(USE_LIGHT) && !defined(USE_DELUXEMAP) && !defined(USE_FAST_LIGHT)
-varying vec3   var_WorldLight;
+varying vec3   var_LightDirection;
+#endif
+
+#if defined(USE_PRIMARY_LIGHT) || defined(USE_SHADOWMAP)
+varying vec3   var_PrimaryLightDirection;
 #endif
 
 #if defined(USE_TCGEN)
@@ -124,7 +132,7 @@ vec2 ModTexCoords(vec2 st, vec3 position, vec4 texMatrix, vec4 offTurb)
 	float phase = offTurb.w;
 	vec2 st2 = vec2(dot(st, texMatrix.xz), dot(st, texMatrix.yw)) + offTurb.xy;
 
-	vec3 offsetPos = position / 1024.0;
+	vec3 offsetPos = vec3(0); //position / 1024.0;
 	offsetPos.x += offsetPos.z;
 	
 	vec2 texOffset = sin((offsetPos.xy + vec2(phase)) * 2.0 * M_PI);
@@ -155,7 +163,7 @@ void main()
 	gl_Position = u_ModelViewProjectionMatrix * position;
 
 #if (defined(USE_LIGHTMAP) || defined(USE_LIGHT_VERTEX)) && !defined(USE_DELUXEMAP) && !defined(USE_FAST_LIGHT)
-	vec3 worldLight = attr_LightDirection;
+	vec3 L = attr_LightDirection;
 #endif
 	
 #if defined(USE_MODELMATRIX)
@@ -167,7 +175,7 @@ void main()
   #endif
 
   #if defined(USE_LIGHTMAP) && !defined(USE_DELUXEMAP) && !defined(USE_FAST_LIGHT)
-	worldLight = (u_ModelMatrix * vec4(worldLight, 0.0)).xyz;
+	L = (u_ModelMatrix * vec4(L, 0.0)).xyz;
   #endif
 #endif
 
@@ -175,24 +183,20 @@ void main()
 	var_Position = position.xyz;
 #endif
 
-#if defined(USE_TCGEN) || defined(USE_NORMALMAP) || defined(USE_LIGHT) && !defined(USE_FAST_LIGHT)
-	vec3 SampleToView = u_ViewOrigin - position.xyz;
-#endif
-
 #if defined(USE_TCGEN) || defined(USE_NORMALMAP) || (defined(USE_LIGHT) && !defined(USE_FAST_LIGHT))
-	var_SampleToView = SampleToView;
+	var_SampleToView = u_ViewOrigin - position.xyz;
 #endif
 
 #if defined(USE_TCGEN)
-	vec2 tex = GenTexCoords(u_TCGen0, position.xyz, normal, u_TCGen0Vector0, u_TCGen0Vector1);
+	vec2 texCoords = GenTexCoords(u_TCGen0, position.xyz, normal, u_TCGen0Vector0, u_TCGen0Vector1);
 #else
-	vec2 tex = attr_TexCoord0.st;
+	vec2 texCoords = attr_TexCoord0.st;
 #endif
 
 #if defined(USE_TCMOD)
-	var_DiffuseTex = ModTexCoords(tex, position.xyz, u_DiffuseTexMatrix, u_DiffuseTexOffTurb);
+	var_DiffuseTex = ModTexCoords(texCoords, position.xyz, u_DiffuseTexMatrix, u_DiffuseTexOffTurb);
 #else
-	var_DiffuseTex = tex;
+	var_DiffuseTex = texCoords;
 #endif
 
 #if defined(USE_LIGHTMAP)
@@ -209,10 +213,10 @@ void main()
 
 #if defined(USE_LIGHT) && !defined(USE_DELUXEMAP)
   #if defined(USE_LIGHT_VECTOR)
-	vec3 worldLight = u_LightOrigin.xyz - (position.xyz * u_LightOrigin.w);
+	vec3 L = u_LightOrigin.xyz - (position.xyz * u_LightOrigin.w);
   #endif
   #if !defined(USE_FAST_LIGHT)
-	var_WorldLight = worldLight;
+	var_LightDirection = L;
   #endif
 #endif
 	
@@ -226,12 +230,16 @@ void main()
 
 #if defined(USE_LIGHT_VECTOR) && defined(USE_FAST_LIGHT)
   #if defined(USE_INVSQRLIGHT)
-	float intensity = 1.0 / dot(worldLight, worldLight);
+	float intensity = 1.0 / dot(L, L);
   #else
-	float intensity = clamp((1.0 - dot(worldLight, worldLight) / (u_LightRadius * u_LightRadius)) * 1.07, 0.0, 1.0);
+	float intensity = clamp((1.0 - dot(L, L) / (u_LightRadius * u_LightRadius)) * 1.07, 0.0, 1.0);
   #endif
-	float NL = clamp(dot(normal, normalize(worldLight)), 0.0, 1.0);
+	float NL = clamp(dot(normal, normalize(L)), 0.0, 1.0);
 
 	var_Color.rgb *= u_DirectedLight * intensity * NL + u_AmbientLight;
 #endif
+
+#if defined(USE_PRIMARY_LIGHT) || defined(USE_SHADOWMAP)
+	var_PrimaryLightDirection = u_PrimaryLightOrigin.xyz - (position.xyz * u_PrimaryLightOrigin.w);
+#endif	
 }
diff --git a/src/renderergl2/glsl/shadowmask_fp.glsl b/src/renderergl2/glsl/shadowmask_fp.glsl
index b3a698c8..4bac5ccd 100644
--- a/src/renderergl2/glsl/shadowmask_fp.glsl
+++ b/src/renderergl2/glsl/shadowmask_fp.glsl
@@ -86,7 +86,7 @@ void main()
 	vec4 shadowpos = u_ShadowMvp * biasPos;
 	
 #if defined(USE_SHADOW_CASCADE)
-	const float fadeTo = 0.5;
+	const float fadeTo = 1.0;
 	result = fadeTo;
 #else
 	result = 0.0;
diff --git a/src/renderergl2/tr_glsl.c b/src/renderergl2/tr_glsl.c
index 163da908..7b9b180c 100644
--- a/src/renderergl2/tr_glsl.c
+++ b/src/renderergl2/tr_glsl.c
@@ -131,7 +131,12 @@ static uniformInfo_t uniformsInfo[] =
 
 	{ "u_InvTexRes",           GLSL_VEC2 },
 	{ "u_AutoExposureMinMax",  GLSL_VEC2 },
-	{ "u_ToneMinAvgMaxLinear", GLSL_VEC3 }
+	{ "u_ToneMinAvgMaxLinear", GLSL_VEC3 },
+
+	{ "u_PrimaryLightOrigin",  GLSL_VEC4  },
+	{ "u_PrimaryLightColor",   GLSL_VEC3  },
+	{ "u_PrimaryLightAmbient", GLSL_VEC3  },
+	{ "u_PrimaryLightRadius",  GLSL_FLOAT }
 };
 
 
@@ -1106,8 +1111,15 @@ void GLSL_InitGPUShaders(void)
 			Q_strcat(extradefines, 1024, "#define USE_PARALLAXMAP\n");
 
 		if (i & LIGHTDEF_USE_SHADOWMAP)
+		{
 			Q_strcat(extradefines, 1024, "#define USE_SHADOWMAP\n");
 
+			if (r_sunlightMode->integer == 1)
+				Q_strcat(extradefines, 1024, "#define SHADOWMAP_MODULATE\n");
+			else if (r_sunlightMode->integer == 2)
+				Q_strcat(extradefines, 1024, "#define USE_PRIMARY_LIGHT\n");
+		}
+
 		if (i & LIGHTDEF_USE_TCGEN_AND_TCMOD)
 		{
 			Q_strcat(extradefines, 1024, "#define USE_TCGEN\n");
diff --git a/src/renderergl2/tr_init.c b/src/renderergl2/tr_init.c
index 84d09b1d..a011bba4 100644
--- a/src/renderergl2/tr_init.c
+++ b/src/renderergl2/tr_init.c
@@ -145,6 +145,7 @@ cvar_t  *r_forceSun;
 cvar_t  *r_forceSunMapLightScale;
 cvar_t  *r_forceSunLightScale;
 cvar_t  *r_forceSunAmbientScale;
+cvar_t  *r_sunlightMode;
 cvar_t  *r_drawSunRays;
 cvar_t  *r_sunShadows;
 cvar_t  *r_shadowFilter;
@@ -1125,10 +1126,11 @@ void R_Register( void )
 	r_genNormalMaps = ri.Cvar_Get( "r_genNormalMaps", "0", CVAR_ARCHIVE | CVAR_LATCH );
 
 	r_forceSun = ri.Cvar_Get( "r_forceSun", "0", CVAR_CHEAT );
-	r_forceSunMapLightScale = ri.Cvar_Get( "r_forceSunMapLightScale", "0.5", CVAR_CHEAT );
-	r_forceSunLightScale = ri.Cvar_Get( "r_forceSunLightScale", "0.5", CVAR_CHEAT );
-	r_forceSunAmbientScale = ri.Cvar_Get( "r_forceSunAmbientScale", "0.2", CVAR_CHEAT );
+	r_forceSunMapLightScale = ri.Cvar_Get( "r_forceSunMapLightScale", "1.0", CVAR_CHEAT );
+	r_forceSunLightScale = ri.Cvar_Get( "r_forceSunLightScale", "1.0", CVAR_CHEAT );
+	r_forceSunAmbientScale = ri.Cvar_Get( "r_forceSunAmbientScale", "0.75", CVAR_CHEAT );
 	r_drawSunRays = ri.Cvar_Get( "r_drawSunRays", "0", CVAR_ARCHIVE | CVAR_LATCH );
+	r_sunlightMode = ri.Cvar_Get( "r_sunlightMode", "1", CVAR_ARCHIVE | CVAR_LATCH );
 
 	r_sunShadows = ri.Cvar_Get( "r_sunShadows", "1", CVAR_ARCHIVE | CVAR_LATCH );
 	r_shadowFilter = ri.Cvar_Get( "r_shadowFilter", "1", CVAR_ARCHIVE | CVAR_LATCH );
diff --git a/src/renderergl2/tr_local.h b/src/renderergl2/tr_local.h
index c550ca18..96f657e4 100644
--- a/src/renderergl2/tr_local.h
+++ b/src/renderergl2/tr_local.h
@@ -791,6 +791,11 @@ typedef enum
 	UNIFORM_AUTOEXPOSUREMINMAX,
 	UNIFORM_TONEMINAVGMAXLINEAR,
 
+	UNIFORM_PRIMARYLIGHTORIGIN,
+	UNIFORM_PRIMARYLIGHTCOLOR,
+	UNIFORM_PRIMARYLIGHTAMBIENT,
+	UNIFORM_PRIMARYLIGHTRADIUS,
+
 	UNIFORM_COUNT
 } uniform_t;
 
@@ -1972,6 +1977,7 @@ extern  cvar_t  *r_forceSun;
 extern  cvar_t  *r_forceSunMapLightScale;
 extern  cvar_t  *r_forceSunLightScale;
 extern  cvar_t  *r_forceSunAmbientScale;
+extern  cvar_t  *r_sunlightMode;
 extern  cvar_t  *r_drawSunRays;
 extern  cvar_t  *r_sunShadows;
 extern  cvar_t  *r_shadowFilter;
diff --git a/src/renderergl2/tr_shade.c b/src/renderergl2/tr_shade.c
index fbf11d6a..efbe69a3 100644
--- a/src/renderergl2/tr_shade.c
+++ b/src/renderergl2/tr_shade.c
@@ -879,209 +879,6 @@ static void ForwardDlight( void ) {
 }
 
 
-static void ForwardSunlight( void ) {
-//	int		l;
-	//vec3_t	origin;
-	//float	scale;
-	int stage;
-	int stageGlState[2];
-	qboolean alphaOverride = qfalse;
-
-	int deformGen;
-	vec5_t deformParams;
-	
-	vec4_t fogDistanceVector, fogDepthVector = {0, 0, 0, 0};
-	float eyeT = 0;
-
-	shaderCommands_t *input = &tess;
-	
-	ComputeDeformValues(&deformGen, deformParams);
-
-	ComputeFogValues(fogDistanceVector, fogDepthVector, &eyeT);
-
-	// deal with vertex alpha blended surfaces
-	if (input->xstages[0] && input->xstages[1] && 
-		(input->xstages[1]->alphaGen == AGEN_VERTEX || input->xstages[1]->alphaGen == AGEN_ONE_MINUS_VERTEX))
-	{
-		stageGlState[0] = input->xstages[0]->stateBits & (GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS);
-
-		if (stageGlState[0] == 0 || stageGlState[0] == (GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO))
-		{
-			stageGlState[1] = input->xstages[1]->stateBits & (GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS);
-
-			if (stageGlState[1] == (GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA))
-			{
-				alphaOverride = qtrue;
-				stageGlState[0] = GLS_SRCBLEND_ONE_MINUS_SRC_ALPHA | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL;
-				stageGlState[1] = GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL;
-			}
-			else if (stageGlState[1] == (GLS_SRCBLEND_ONE_MINUS_SRC_ALPHA | GLS_DSTBLEND_SRC_ALPHA))
-			{
-				alphaOverride = qtrue;
-				stageGlState[0] = GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL;
-				stageGlState[1] = GLS_SRCBLEND_ONE_MINUS_SRC_ALPHA | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL;
-			}
-		}
-	}
-
-	if (!alphaOverride)
-	{
-		stageGlState[0] =
-		stageGlState[1] = GLS_SRCBLEND_ONE | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_EQUAL;
-	}
-
-	for ( stage = 0; stage < 2 /*MAX_SHADER_STAGES */; stage++ )
-	{
-		shaderStage_t *pStage = input->xstages[stage];
-		shaderProgram_t *sp;
-		vec4_t vector;
-		matrix_t matrix;
-
-		if ( !pStage )
-		{
-			break;
-		}
-
-		//VectorCopy( dl->transformed, origin );
-
-		//if (pStage->glslShaderGroup == tr.lightallShader)
-		{
-			int index = pStage->glslShaderIndex;
-
-			index &= ~(LIGHTDEF_LIGHTTYPE_MASK | LIGHTDEF_USE_DELUXEMAP);
-			index |= LIGHTDEF_USE_LIGHT_VECTOR | LIGHTDEF_USE_SHADOWMAP;
-
-			if (backEnd.currentEntity && backEnd.currentEntity != &tr.worldEntity)
-			{
-				index |= LIGHTDEF_ENTITY;
-			}
-
-			sp = &tr.lightallShader[index];
-		}
-
-		backEnd.pc.c_lightallDraws++;
-
-		GLSL_BindProgram(sp);
-
-		GLSL_SetUniformMatrix16(sp, UNIFORM_MODELVIEWPROJECTIONMATRIX, glState.modelviewProjection);
-		GLSL_SetUniformVec3(sp, UNIFORM_VIEWORIGIN, backEnd.viewParms.or.origin);
-
-		GLSL_SetUniformFloat(sp, UNIFORM_VERTEXLERP, glState.vertexAttribsInterpolation);
-
-		GLSL_SetUniformInt(sp, UNIFORM_DEFORMGEN, deformGen);
-		if (deformGen != DGEN_NONE)
-		{
-			GLSL_SetUniformFloat5(sp, UNIFORM_DEFORMPARAMS, deformParams);
-			GLSL_SetUniformFloat(sp, UNIFORM_TIME, tess.shaderTime);
-		}
-
-		if ( input->fogNum ) {
-			vec4_t fogColorMask;
-
-			GLSL_SetUniformVec4(sp, UNIFORM_FOGDISTANCE, fogDistanceVector);
-			GLSL_SetUniformVec4(sp, UNIFORM_FOGDEPTH, fogDepthVector);
-			GLSL_SetUniformFloat(sp, UNIFORM_FOGEYET, eyeT);
-
-			ComputeFogColorMask(pStage, fogColorMask);
-
-			GLSL_SetUniformVec4(sp, UNIFORM_FOGCOLORMASK, fogColorMask);
-		}
-
-		{
-			vec4_t baseColor;
-			vec4_t vertColor;
-
-			ComputeShaderColors(pStage, baseColor, vertColor);
-
-			if (alphaOverride)
-			{
-				if (input->xstages[1]->alphaGen == AGEN_VERTEX)
-				{
-					baseColor[3] = 0.0f;
-					vertColor[3] = 1.0f;
-				}
-				else if (input->xstages[1]->alphaGen == AGEN_ONE_MINUS_VERTEX)
-				{
-					baseColor[3] = 1.0f;
-					vertColor[3] = -1.0f;
-				}
-			}
-
-			GLSL_SetUniformVec4(sp, UNIFORM_BASECOLOR, baseColor);
-			GLSL_SetUniformVec4(sp, UNIFORM_VERTCOLOR, vertColor);
-		}
-
-		if (pStage->alphaGen == AGEN_PORTAL)
-		{
-			GLSL_SetUniformFloat(sp, UNIFORM_PORTALRANGE, tess.shader->portalRange);
-		}
-
-		GLSL_SetUniformInt(sp, UNIFORM_COLORGEN, pStage->rgbGen);
-		GLSL_SetUniformInt(sp, UNIFORM_ALPHAGEN, pStage->alphaGen);
-
-		GLSL_SetUniformVec3(sp, UNIFORM_DIRECTEDLIGHT, backEnd.refdef.sunCol);
-		GLSL_SetUniformVec3(sp, UNIFORM_AMBIENTLIGHT,  backEnd.refdef.sunAmbCol);
-
-		GLSL_SetUniformVec4(sp, UNIFORM_LIGHTORIGIN, backEnd.refdef.sunDir);
-
-		GLSL_SetUniformFloat(sp, UNIFORM_LIGHTRADIUS, 9999999999.9f);
-
-		GLSL_SetUniformVec2(sp, UNIFORM_MATERIALINFO, pStage->materialInfo);
-		
-		GL_State( stageGlState[stage] );
-
-		GLSL_SetUniformMatrix16(sp, UNIFORM_MODELMATRIX, backEnd.or.transformMatrix);
-
-		if (pStage->bundle[TB_DIFFUSEMAP].image[0])
-			R_BindAnimatedImageToTMU( &pStage->bundle[TB_DIFFUSEMAP], TB_DIFFUSEMAP);
-
-		if (pStage->bundle[TB_NORMALMAP].image[0])
-			R_BindAnimatedImageToTMU( &pStage->bundle[TB_NORMALMAP], TB_NORMALMAP);
-
-		if (pStage->bundle[TB_SPECULARMAP].image[0])
-			R_BindAnimatedImageToTMU( &pStage->bundle[TB_SPECULARMAP], TB_SPECULARMAP);
-
-		/*
-		{
-			GL_BindToTMU(tr.sunShadowDepthImage[0], TB_SHADOWMAP);
-			GL_BindToTMU(tr.sunShadowDepthImage[1], TB_SHADOWMAP2);
-			GL_BindToTMU(tr.sunShadowDepthImage[2], TB_SHADOWMAP3);
-			GLSL_SetUniformMatrix16(sp, UNIFORM_SHADOWMVP, backEnd.refdef.sunShadowMvp[0]);
-			GLSL_SetUniformMatrix16(sp, UNIFORM_SHADOWMVP2, backEnd.refdef.sunShadowMvp[1]);
-			GLSL_SetUniformMatrix16(sp, UNIFORM_SHADOWMVP3, backEnd.refdef.sunShadowMvp[2]);
-		}
-		*/
-		GL_BindToTMU(tr.screenShadowImage, TB_SHADOWMAP);
-
-		ComputeTexMatrix( pStage, TB_DIFFUSEMAP, matrix );
-
-		VectorSet4(vector, matrix[0], matrix[1], matrix[4], matrix[5]);
-		GLSL_SetUniformVec4(sp, UNIFORM_DIFFUSETEXMATRIX, vector);
-
-		VectorSet4(vector, matrix[8], matrix[9], matrix[12], matrix[13]);
-		GLSL_SetUniformVec4(sp, UNIFORM_DIFFUSETEXOFFTURB, vector);
-
-		GLSL_SetUniformInt(sp, UNIFORM_TCGEN0, pStage->bundle[0].tcGen);
-
-		//
-		// draw
-		//
-
-		if (input->multiDrawPrimitives)
-		{
-			R_DrawMultiElementsVBO(input->multiDrawPrimitives, input->multiDrawMinIndex, input->multiDrawMaxIndex, input->multiDrawNumIndexes, input->multiDrawFirstIndex);
-		}
-		else
-		{
-			R_DrawElementsVBO(input->numIndexes, input->firstIndex, input->minIndex, input->maxIndex);
-		}
-
-		backEnd.pc.c_totalIndexes += tess.numIndexes;
-		backEnd.pc.c_dlightIndexes += tess.numIndexes;
-	}
-}
-
-
 static void ProjectPshadowVBOGLSL( void ) {
 	int		l;
 	vec3_t	origin;
@@ -1330,7 +1127,7 @@ static void RB_IterateStagesGeneric( shaderCommands_t *input )
 				index |= LIGHTDEF_ENTITY;
 			}
 
-			if ((backEnd.viewParms.flags & VPF_USESUNLIGHT) && ((index & LIGHTDEF_USE_LIGHTMAP) || (index & LIGHTDEF_USE_LIGHT_VERTEX)))
+			if (r_sunlightMode->integer && (backEnd.viewParms.flags & VPF_USESUNLIGHT) && (index & LIGHTDEF_LIGHTTYPE_MASK))
 			{
 				index |= LIGHTDEF_USE_SHADOWMAP;
 			}
@@ -1498,12 +1295,12 @@ static void RB_IterateStagesGeneric( shaderCommands_t *input )
 		{
 			int i;
 
-			if ((backEnd.viewParms.flags & VPF_USESUNLIGHT) && ((pStage->glslShaderIndex & LIGHTDEF_USE_LIGHTMAP) || (pStage->glslShaderIndex & LIGHTDEF_USE_LIGHT_VERTEX)))
+			if ((backEnd.viewParms.flags & VPF_USESUNLIGHT) && (pStage->glslShaderIndex & LIGHTDEF_LIGHTTYPE_MASK))
 			{
 				GL_BindToTMU(tr.screenShadowImage, TB_SHADOWMAP);
-				GLSL_SetUniformVec3(sp, GENERIC_UNIFORM_AMBIENTLIGHT,   backEnd.refdef.sunAmbCol);
-				GLSL_SetUniformVec3(sp, GENERIC_UNIFORM_DIRECTEDLIGHT,  backEnd.refdef.sunCol);
-				GLSL_SetUniformVec4(sp, GENERIC_UNIFORM_LIGHTORIGIN, backEnd.refdef.sunDir);
+				GLSL_SetUniformVec3(sp, UNIFORM_PRIMARYLIGHTAMBIENT, backEnd.refdef.sunAmbCol);
+				GLSL_SetUniformVec3(sp, UNIFORM_PRIMARYLIGHTCOLOR,   backEnd.refdef.sunCol);
+				GLSL_SetUniformVec4(sp, UNIFORM_PRIMARYLIGHTORIGIN,  backEnd.refdef.sunDir);
 			}
 
 			if ((r_lightmap->integer == 1 || r_lightmap->integer == 2) && pStage->bundle[TB_LIGHTMAP].image[0])
@@ -1796,14 +1593,6 @@ void RB_StageIteratorGeneric( void )
 		}
 	}
 
-#if 0
-	if ((backEnd.viewParms.flags & VPF_USESUNLIGHT) && tess.shader->sort <= SS_OPAQUE 
-	//if ((tr.sunShadows || r_forceSunlight->value > 0.0f) && tess.shader->sort <= SS_OPAQUE 
-	    && !(tess.shader->surfaceFlags & (SURF_NODLIGHT | SURF_SKY) ) && tess.xstages[0]->glslShaderGroup == tr.lightallShader) {
-		ForwardSunlight();
-	}
-#endif
-
 	//
 	// now do fog
 	//
diff --git a/src/renderergl2/tr_shader.c b/src/renderergl2/tr_shader.c
index 6a42f4cb..7eebf787 100644
--- a/src/renderergl2/tr_shader.c
+++ b/src/renderergl2/tr_shader.c
@@ -2494,6 +2494,30 @@ static qboolean CollapseStagesToGLSL(void)
 	if (numStages == i && i >= 2 && CollapseMultitexture())
 		numStages--;
 
+	// convert any remaining lightmap stages to a lighting pass with a white texture
+	// only do this with r_sunlightMode non-zero, as it's only for correct shadows.
+	if (r_sunlightMode->integer)
+	{
+		for (i = 0; i < MAX_SHADER_STAGES; i++)
+		{
+			shaderStage_t *pStage = &stages[i];
+
+			if (!pStage->active)
+				continue;
+
+			if (pStage->bundle[TB_DIFFUSEMAP].isLightmap)
+			{
+				pStage->glslShaderGroup = tr.lightallShader;
+				pStage->glslShaderIndex = LIGHTDEF_USE_LIGHTMAP;
+				if (r_deluxeMapping->integer && tr.worldDeluxeMapping)
+					pStage->glslShaderIndex |= LIGHTDEF_USE_DELUXEMAP;
+				pStage->bundle[TB_LIGHTMAP] = pStage->bundle[TB_DIFFUSEMAP];
+				pStage->bundle[TB_DIFFUSEMAP].image[0] = tr.whiteImage;
+				pStage->bundle[TB_DIFFUSEMAP].isLightmap = qfalse;
+			}
+		}
+	}
+
 	return numStages;
 }