init (again)

shaders/other/color-alt_luma.glsl

@@ -0,0 +1,11 @@
+
+//!DESC color-alt_luma (Black & White)
+//!HOOK LUMA
+//!BIND HOOKED
+
+vec4 hook()
+{
+    float color = LUMA_texOff(0).x;
+    return vec4(1.0 - color);
+}
+