Two more post processing shaders just for fun. Vignette looks pretty nice.

assets/shaders/defaultshaders.ini

@@ -12,4 +12,14 @@ Vertex=natural.vsh
 Name=Grayscale
 Author=Henrik
 Fragment=grayscale.fsh
+Vertex=fxaa.vsh
+[Vignette]
+Name=Vignette
+Author=Henrik
+Fragment=vignette.fsh
+Vertex=fxaa.vsh
+[InverseColors]
+Name=Inverse Colors
+Author=Henrik
+Fragment=inversecolors.fsh
 Vertex=fxaa.vsh

assets/shaders/inversecolors.fsh

@@ -0,0 +1,19 @@
+// Simple false color shader
+
+#ifdef GL_ES
+precision mediump float;
+precision mediump int;
+#endif
+
+uniform sampler2D sampler0;
+varying vec2 v_texcoord0;
+
+void main() {
+  vec3 rgb = texture2D(sampler0, v_texcoord0.xy).xyz;
+  float luma = dot(rgb, vec3(0.299, 0.587, 0.114));
+  vec3 gray = vec3(luma, luma, luma) - 0.5;
+  rgb -= vec3(0.5, 0.5, 0.5);
+
+  gl_FragColor.rgb = saturate(mix(rgb, gray, 2.0) + 0.5);
+  gl_FragColor.a = 1.0;
+}

assets/shaders/vignette.fsh

@@ -0,0 +1,16 @@
+// Simple false color shader
+
+#ifdef GL_ES
+precision mediump float;
+precision mediump int;
+#endif
+
+uniform sampler2D sampler0;
+varying vec2 v_texcoord0;
+
+void main() {
+  float vignette = 1.1 - 0.6 * (dot(v_texcoord0 - 0.5, v_texcoord0 - 0.5) * 2.0);
+  vec3 rgb = texture2D(sampler0, v_texcoord0.xy).xyz;
+  gl_FragColor.rgb = vignette * rgb;
+  gl_FragColor.a = 1.0;
+}