I also found that when all the materials were opened, there was a strong GI effect around the material display view, which seemed to be brought about by VXGI. The current situation is that the normal viewport can not display the material, but it seems that the first time I compiled into the engine, you can see the material is normal display. But when the material is displayed normally, the engine compiles shaders again. After compiling, I can’t display the material normally in the viewport of any project. Only when the material is turned on can you see the material with the texture and shader, and a strong GI effect around the material.
At the same time, VXGI also can not work properly, post-processing and any command of the console can not display VXGI normally in the viewport, but there is a strong GI overflow in the material preview window.
But I am not a programmer, so I can not find a solution, I can only help you to test engine.
In addition, the hardware I use is I7 8700K and GTX 1080Ti, in previous versions can normally run the Gameworks plug-in.