Bump noise problem on a surface

[haprod]

Hi, I'm rendering a product photo and I have a problem with bump noise on a surface:

The top of the product is one continuous surface, but with the bump noise it looks like there are two separate surfaces (see picture and red arrows). If I change the lighting or rotate the product, the line remains in the same position on the product. The 3D model is created with CREO.

Any ideas what could cause this?

[Esben Oxholm]

Is it possible for you to share your scene as a ksp file?
I would like to have a look at it.

Best regards,

[Rex]

Hey haprod,

When you say bump noise are you referring to the procedural texture? If you would like me to have a look, save a KeyShot Package file (File>Save Package) and send the .KSP to rex@luxion.com via keyshot.wetransfer.com

Regards,
Rex

[haprod]

Thanks for the quick reply. I just sent the package via keyshot.wetransfer.com.

[Rex]

Thanks for the quick reply. I just sent the package via keyshot.wetransfer.com.

haprod,

Looks like this is a bug related to a combination of a small scale and a high number of "levels". I have filed the issue with development but looks like you can do the following for a temporary fix. Edit the material > select the bump texture > open the mapping tool > and click the reset button on the realtime overlay dialogue. Now reduce the level count to 4 and the seams should go away. This will also speed up render times a bit. Also keep in mind the two arrows in the screenshot point at two unlinked materials - ABS, rough, kipinoity #1 and ABS, rough, kipinoity #9. You probably want to link these.

Cheers,
Rex

[haprod]

Thank you very much for quick help, this worked well!

A question: what's the benefit of linking the materials? Or downside not linking them?

[thomasteger]

The benefit of linking material is that you deal with a single material across the model. So when you make adjustments to the material it will adjust them on all parts that have the same material applied.