I get these stripes in the rendering because of the bump. noise texture.
Also have a roughness on it.
Why is this? how to avoid this in general?
Have you tried right-click > Edit Geometry > Edit Normals > Calculate Vertex Normals?
Never used that before, but tried it now and it doesn't work. I Think i figure it out. I used the plugin for fusion360. That export feature has a lot of problems, you can only save your keyshot file locally for some reason not in a server and Nurbs is not included. Think it was something to do with that. Now I remember why I can't use the plugin :)