After using displacement in VRay, the effect reflected by CPU and GPU modes is completely different

V-Ray V-Ray for Cinema 4D Issues
1

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Just like in the picture, although the model is the same, there is a significant difference in the reflection effect. I have uploaded the file
1.rar (1.65 MB)

2

Hi @123456_1 Thank you for sharing! Have you tested the same set-up with the latest official V-Ray for Cinema 4D ?

Also, have you noticed if it happens with other textures as well or just this one?

3

I tested it and it seems that only this texture produces an incorrect effect, which is quite strange:face_with_spiral_eyes:

4

It seems like this is the Maxon noise texture, if I’m not mistaken? If it is, it is quite possible that there are some minor differences in how it is evaluated on CPU and GPU. While we might try to equalize the evaluation, it might prove quite difficult to get exactly the same result.

Keep in mind that V-Ray and V-Ray GPU are separate engines and as such - equal results can not be expected, due to differences in evaluation.

5

I tested again and found that this is a problem with this noise pattern. Switching to UV mode will cause errors, changing to texture mode will be correct ![_SG_DE65Y[quote=“deyan.hadzhiev, post:4, topic:124021, username:deyan.hadzhiev”]
It seems like this is the Maxon noise texture, if I’m not mistaken? If it is, it is quite possible that there are some minor differences in how it is evaluated on CPU and GPU. While we might try to equalize the evaluation, it might prove quite difficult to get exactly the same result.

Keep in mind that V-Ray and V-Ray GPU are separate engines and as such - equal results can not be expected, due to differences in evaluation.
[/quote]

I tested again and found that this is a problem with this noise pattern. Switching to UV mode will cause errors, changing to texture mode will be correct )R8Z60I6MIL5C.png|676x739](upload://3MLIPhfVsbwUNlTvVfRBH2gaBnc.png)