Machined metal bump artifacts

[gristle]

Hi Juanjo,

Any idea what is causing the end of the cylinder to look faceted? I'm using triplanar projection to set up this material and the concentric rings on the end is a single large texture.
I've tried all sorts of things but cannot get rid of the facets. Scene attached. Cheers, Andrew.

[Lewis]

silly question but did you turned on smoothing for material ?

[gristle]

Yep, smoothing on. The actual scene (couldn't upload the actual parts) is using vertex normal smoothing.

I've found a work around by plugging a ripple procedural texture into the image texture node. For some reason the faceting is no longer present, which is odd because the procedural is converted into an image.

[Lewis]

I'm glad you found solution (even if workaround) but please do send that scene (seems simple enough content) to Juan so he can check is it plugin or octane BUG.

[gristle]

All good, it's attached to my first post.

[juanjgon]

Can you please upload the file again? The attached file seems corrupted.

Thanks,
-Juanjo

[gristle]

I've uploaded a new set of files, including the procedural texture.
Hopefully these ones work for you?

[gristle]

Juanjo, it looks like the issue on the end of the cylinder was with my bump map silly me...

[3dreamstudios]

What exactly was wrong with your bump? I run into this occasionally too. I figured it was a glitch in the matrix! Sometimes IPR does it randomly but not terribly often during an actual render. *shrug*

[gristle]

It turned out the way I made the ring texture created small flats, which in turn created what I thought were artifacts.

I had projected lines onto a cone and the cone mesh was a bit coarse...


Now if someone has any suggestions for better texture sampling and moire pattern reduction in Octane, I am all ears