#5 - fixed interpolation & rollback

modules/client/shaders/Opaque.frag

@@ -2,6 +2,9 @@
 
 layout(location = 0) out vec4 outColor;
 
+layout(location = 0) in vec3 inNormal;
+
 void main() {
+    float diffuse = max(0.1, dot(vec3(0.8, 1.5, -1.0), inNormal));
     outColor = vec4(1.0, 0.0, 0.0, 1.0);
 }