Well, thank you very much for your answer, I am from octane render users to redshift users and then to the current Arnold users, I sincerely hope that Arnold is getting better and better, the current use of the experience feel the biggest highlights are: Arnold rendering output image quality is very high, stronger than the first two (especially in the volume of the fog), a little rarity is the GPU speed and quality, there are some rendering functions GPU is not as good as the CPU, the other is the speed, I hope the development team with the help of the current NVIDIA technology (DLSS3, light pursuit, etc.) to improve. In the elimination of noise tested in the frosted glass material scene there are some noise in the GPU mode is difficult to eliminate, need to use the CPU rendering, but this reduces the speed advantage of the GPU, if you try to reduce the noise function will lose a lot of details (so this will wear out the Arnold rendering out of the high quality of the advantages of the map). Lastly, thanks a lot for your judgement, you were spot on, it was a plugin installation issue, after reinstalling this issue disappeared, thanks again.