Hi DesuDeus,

> The no noise version is maxwell yes

It looks like the "no noise" version does not have quite the same amount of problems that you are indicating in red arrows in the other attached image above, is that correct?

It seems to me that you probably have some different parameters in Maxwell that are not working well with your situation - if that's the case the solution is going to involve controlling those things in Maxwell, not anything to do with changing how the geometry is imported.

Again it looks like there are no artifacts on the render done with the built-in C4D renderer, is that correct? Or do you see any problems in that render too?

If you see no shading problems of any kind in the C4D built in render but you do see strange things in Maxwell, that tells me that Maxwell in particular does not like something about the model or environment or parameters that you are currently using, and if that is the case you will probably need to make some adjustments to make Maxwell more happy about the whole setup. You'll probably need to get some Maxwell-specific tips if that's the case.

Maybe some other C4D users will be able to test with your model to verify if they're able to get it over ok or if they see any problems too.

- Michael