Yeah ive had a quick chat with Morgan about the work, Idea’s for speed increases & quality. Morgans a top boy, he always share’s the good ****!. If Epic staff don’t port this Opengl code over to UE4 Ill take a look. Check the video though (which is just a tech demo, doesnt have PBR of any of the other bells and whistles UE4 provides) mixed with UE4 this could be a very nice screen space GI system that could well reach near to photoreal results with the right work.