claude godot 4 port

assets/foreground_invert.gdshader

@@ -0,0 +1,10 @@
+shader_type canvas_item;
+
+uniform float transition : hint_range(0.0, 1.0) = 0.0;
+uniform sampler2D screen_texture : hint_screen_texture, repeat_disable, filter_nearest;
+
+void fragment() {
+	vec4 c = texture(screen_texture, SCREEN_UV);
+	vec3 inverted = vec3(1.0) - c.rgb;
+	COLOR.rgb = mix(c.rgb, inverted, vec3(transition));
+}