Converted rendering engine to reverse-z

leenkx/Shaders/include/pass_viewray2.vert.glsl

@@ -19,8 +19,9 @@ void main() {
 
 	gl_Position = vec4(pos.xy, 0.0, 1.0);
 
-	// NDC (at the back of cube)
-	vec4 v = vec4(pos.x, pos.y, 1.0, 1.0);
-	v = vec4(invP * v);
+	// For reverse-Z, far plane sits at NDC z = 0
+	vec4 clip = vec4(pos.x, pos.y, 0.0, 1.0);
+	vec4 v    = invP * clip;
+	// reconstruct a view‐space direction
 	viewRay = vec3(v.xy / v.z, 1.0);
 }