add v1.541 (Extreme)

shaders/dh_terrain.fsh

@@ -0,0 +1,31 @@
+#version 120
+/* DRAWBUFFERS:01 */
+
+#define gbuffers_terrain
+#include "shaders.settings"
+
+varying vec4 color;
+varying vec4 normal;
+varying float lmcoord;
+
+//encode normal in two channel (xy), emissive lightmap (z) and sky lightmap (w), blend mode must be disabled in shaders.properties for this to work without issues.
+vec4 encode (vec3 n){
+    return vec4(n.xy*inversesqrt(n.z*8.0+8.0) + 0.5, lmcoord, 1.0); // set sky lightmap to 1 for distant horizons
+}
+
+vec3 RGB2YCoCg(vec3 c){
+	return vec3( 0.25*c.r+0.5*c.g+0.25*c.b, 0.5*c.r-0.5*c.b +0.5, -0.25*c.r+0.5*c.g-0.25*c.b +0.5);
+}
+
+void main() {
+
+	vec4 cAlbedo = vec4(RGB2YCoCg(color.rgb),color.a);
+
+	bool pattern = (mod(gl_FragCoord.x,2.0)==mod(gl_FragCoord.y,2.0));
+	cAlbedo.g = (pattern)?cAlbedo.b: cAlbedo.g;
+	cAlbedo.b = normal.a;
+
+	gl_FragData[0] = cAlbedo;
+	gl_FragData[1] = encode(normal.xyz);
+
+}