diff --git a/neo/renderer/RenderProgs_embedded.h b/neo/renderer/RenderProgs_embedded.h
index d7b0c9c2..4ac72aff 100644
--- a/neo/renderer/RenderProgs_embedded.h
+++ b/neo/renderer/RenderProgs_embedded.h
@@ -5639,7 +5639,7 @@ static const cgShaderDef_t cg_renderprogs[] =
 		"	localNormal = normalize( localNormal );\n"
 		"	\n"
 		"	// traditional very dark Lambert light model used in Doom 3\n"
-		"	half ldotN = dot3( localNormal, lightVector );\n"
+		"	half ldotN = saturate( dot3( localNormal, lightVector ) );\n"
 		"\n"
 		"#if defined(USE_HALF_LAMBERT)\n"
 		"	// RB: http://developer.valvesoftware.com/wiki/Half_Lambert\n"
@@ -5948,7 +5948,20 @@ static const cgShaderDef_t cg_renderprogs[] =
 		"	// RB end\n"
 		"	localNormal.z = sqrt( abs( dot( localNormal.xy, localNormal.xy ) - 0.25 ) );\n"
 		"	localNormal = normalize( localNormal );\n"
+		"	\n"
+		"	// traditional very dark Lambert light model used in Doom 3\n"
+		"	half ldotN = saturate( dot3( localNormal, lightVector ) );\n"
 		"\n"
+		"#if defined(USE_HALF_LAMBERT)\n"
+		"	// RB: http://developer.valvesoftware.com/wiki/Half_Lambert\n"
+		"	half halfLdotN = dot3( localNormal, lightVector ) * 0.5 + 0.5;\n"
+		"	halfLdotN *= halfLdotN;\n"
+		"\n"
+		"	half lambert = halfLdotN;\n"
+		"#else\n"
+		"	half lambert = ldotN;\n"
+		"#endif\n"
+		"	\n"
 		"	const half specularPower = 10.0f;\n"
 		"	half hDotN = dot3( normalize( fragment.texcoord6.xyz ), localNormal );\n"
 		"	// RB: added abs\n"
@@ -5956,7 +5969,7 @@ static const cgShaderDef_t cg_renderprogs[] =
 		"\n"
 		"	half3 diffuseColor = diffuseMap * rpDiffuseModifier.xyz;\n"
 		"	half3 specularColor = specMap.xyz * specularContribution * rpSpecularModifier.xyz;\n"
-		"	half3 lightColor = lightProj.xyz * lightFalloff.xyz; // ambient fix\n"
+		"	half3 lightColor = 1.0 * lightProj.xyz * lightFalloff.xyz;\n"
 		"\n"
 		"	result.color.xyz = ( diffuseColor + specularColor ) * lightColor * fragment.color.xyz;\n"
 		"	result.color.w = 1.0;\n"
@@ -6158,14 +6171,28 @@ static const cgShaderDef_t cg_renderprogs[] =
 		"	// RB end\n"
 		"	localNormal.z = sqrt( abs( dot( localNormal.xy, localNormal.xy ) - 0.25 ) );\n"
 		"	localNormal = normalize( localNormal );\n"
+		"	\n"
+		"	// traditional very dark Lambert light model used in Doom 3\n"
+		"	half ldotN = saturate( dot3( localNormal, lightVector ) );\n"
 		"\n"
+		"#if defined(USE_HALF_LAMBERT)\n"
+		"	// RB: http://developer.valvesoftware.com/wiki/Half_Lambert\n"
+		"	half halfLdotN = dot3( localNormal, lightVector ) * 0.5 + 0.5;\n"
+		"	halfLdotN *= halfLdotN;\n"
+		"\n"
+		"	half lambert = halfLdotN;\n"
+		"#else\n"
+		"	half lambert = ldotN;\n"
+		"#endif\n"
+		"	\n"
 		"	const half specularPower = 10.0f;\n"
 		"	half hDotN = dot3( normalize( fragment.texcoord6.xyz ), localNormal );\n"
-		"	half3 specularContribution = _half3( pow( hDotN, specularPower ) );\n"
+		"	// RB: added abs\n"
+		"	half3 specularContribution = _half3( pow( abs( hDotN ), specularPower ) );\n"
 		"\n"
 		"	half3 diffuseColor = diffuseMap * rpDiffuseModifier.xyz;\n"
 		"	half3 specularColor = specMap.xyz * specularContribution * rpSpecularModifier.xyz;\n"
-		"	half3 lightColor = lightProj.xyz * lightFalloff.xyz; // ambient fix\n"
+		"	half3 lightColor = 1.0 * lightProj.xyz * lightFalloff.xyz;\n"
 		"\n"
 		"	result.color.xyz = ( diffuseColor + specularColor ) * lightColor * fragment.color.xyz;\n"
 		"	result.color.w = 1.0;\n"
@@ -6438,7 +6465,7 @@ static const cgShaderDef_t cg_renderprogs[] =
 		"	localNormal = normalize( localNormal );\n"
 		"	\n"
 		"	// traditional very dark Lambert light model used in Doom 3\n"
-		"	half ldotN = dot3( localNormal, lightVector );\n"
+		"	half ldotN = saturate( dot3( localNormal, lightVector ) );\n"
 		"\n"
 		"#if defined(USE_HALF_LAMBERT)\n"
 		"	// RB: http://developer.valvesoftware.com/wiki/Half_Lambert\n"