Rewrote collision shader to use generated normals with fake lighting instead of generated UV coords

resources/shaders/CollisionShader.ps

@@ -1,17 +1,16 @@
 #version 330 core
 
 // Input
-in vec2 TexCoord;
+in vec4 LightColor;
 
 // Output
 out vec4 PixelColor;
 
 // Uniforms
-uniform sampler2D Texture;
 uniform vec4 TintColor;
 
 // Main
 void main()
 {
-	PixelColor = vec4(texture(Texture, TexCoord).rgb, 0) * TintColor;
+	PixelColor = LightColor * TintColor;
 }

resources/shaders/CollisionShader.vs

@@ -1,11 +1,11 @@
-// This shader will be obsoleted soon when the collision rendering is improved
 #version 330 core
 
 // Input
-layout(location = 0) in vec3 Position;
+layout(location = 0) in vec3 RawPosition;
+layout(location = 1) in vec3 RawNormal;
 
 // Output
-out vec2 TexCoord;
+out vec4 LightColor;
 
 // Uniforms
 layout(std140) uniform MVPBlock
@@ -18,11 +18,12 @@ layout(std140) uniform MVPBlock
 // Main
 void main()
 {
-	mat4 MVP = ModelMtx * ViewMtx * ProjMtx;
-	gl_Position = vec4(Position, 1) * MVP;
+    mat4 MVP = ModelMtx * ViewMtx * ProjMtx;
+	gl_Position = vec4(RawPosition, 1) * MVP;
 	
-	// UV Generation
-	float avg = (Position.x + Position.z) / 2;
-	TexCoord.x = avg;
-	TexCoord.y = Position.y + (avg / 2);
+	// Fake lighting; render one white skylight pointing straight down with an ambient 0.5
+	float LightDot = dot(RawNormal, vec3(0, 0, -1));
+	float Alpha = (-LightDot + 1.0) / 2;
+	float LightAlpha = mix(0.5, 0.9, Alpha);
+	LightColor = vec4(LightAlpha, LightAlpha, LightAlpha, 1.0);
 }