volumetric: Fix tcmask normals

Warzone2100 · Jan 15, 2024 · 67e6365 · 67e6365
1 parent a1178b2
commit 67e6365
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/data/base/shaders/vk/tcmask_instanced.frag b/data/base/shaders/vk/tcmask_instanced.frag
@@ -348,7 +348,10 @@ void main()
 		MaterialInfo materialInfo;
 		materialInfo.albedo = diffuse;
 		materialInfo.gloss = specularMapValue;
-		light += iterateOverAllPointLights(clipSpaceCoord, fragPos, -N, normalize(halfVec - lightDir), materialInfo, identityMat);
+		// Normals are in view space, we need to get back to world space
+		// No idea why we need the minus
+		vec3 fragNormal = -(inverse(ViewMatrix) * vec4(N, 0)).xyz;
+		light += iterateOverAllPointLights(clipSpaceCoord, fragPos, fragNormal, normalize(halfVec - lightDir), materialInfo, identityMat);
 	}
 
 	light.rgb *= visibility;