Fix conversion to rgbd not between 0..1 for rgb

src/Shaders/ShadersInclude/helperFunctions.fx

@@ -113,7 +113,7 @@ vec4 toRGBD(vec3 color) {
     // Helps with png quantization.
     rgb = toGammaSpace(rgb);
 
-    return vec4(rgb, D); 
+    return vec4(clamp(rgb, 0., 1.), D); 
 }
 
 vec3 fromRGBD(vec4 rgbd) {