Render is grainy with GPU Here is my problem. When I try to render with my GPU the image (mainly the lights) are not the same as with my CPU. The image is more grainy with the GPU than with the CPU and even if I do not change any parameter from one rendering to another. I would like to be able to use my GPU to save time with my rendering

My config :

CPU : AMD Ryzen 2700x
GPU : EVGA GTX 1070
Blender version : 2.79

I can'T upload the .blend files because he is pack with all the texture (more than 600MB)
I think I found my problem. It is related to the shader "volume scattering" that I put in the world settings in the "volume" if I remove this option my CPU rendering become identical to my GPU rendering. I found on several website people who say that there is a problem with the "volume scattering" and the CUDA.

https://blenderartists.org/t/cycles-gpu-renderer-cant-render-volume-scatter/647962

https://developer.blender.org/T50808

https://blenderartists.org/t/volume-scatter-with-gpu-worse-than-with-cpu-in-cycles/651603