Overlay the user Shaders/ over the shared one to avoid copying files

Data/Sys/Shaders/invertedoutline.glsl

@@ -0,0 +1,14 @@
+uniform sampler2D samp9;
+
+out vec4 ocol0;
+in vec2 uv0;
+
+uniform vec4 resolution;
+
+void main()
+{
+  float4 c0 = texture(samp9, uv0);
+  float4 c1 = texture(samp9, uv0 + float2(5,5)*resolution.zw);
+
+  ocol0 = c0 - c1;
+}