Vondila

Hello @erichlof It seems that this method is only applicable to images with a sun. What if I don't have a sun on my envmap? 

@erichlof Here is a description of infinite area lights，I hope this is helpful ：） http://www.pbr-book.org/3ed-2018/Light_Transport_I_Surface_Reflection/Sampling_Light_Sources.html#InfiniteAreaLights https://github.com/hoverinc/ray-tracing-renderer/blob/master/src/renderer/glsl/chunks/envMap.glsl#L1

@erichlof https://www.shadertoy.com/view/3dd3Wr https://github.com/BrutPitt/glslSmartDeNoise Have a try.