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

Data/Sys/Shaders/nightvision.glsl

@@ -0,0 +1,17 @@
+uniform sampler2D samp9;
+
+out vec4 ocol0;
+in vec2 uv0;
+
+void main()
+{
+  float4 c0 = texture(samp9, uv0).rgba;
+  float green = c0.g;
+
+  if (c0.g < 0.50)
+  {
+    green = c0.r + c0.b;
+  }
+
+  ocol0 = float4(0.0, green, 0.0, 1.0);
+}