topic Re: Bump2d output issue in Arnold for Cinema 4D Forum

Bump2d output issue

Anonymous — Tue, 23 Jan 2018 21:05:10 GMT

screen-shot-2018-01-24-at-000432.jpg

Re: Bump2d output issue

lee_griggs — Wed, 24 Jan 2018 08:32:35 GMT

What is the issue exactly? Are you using a normal map shader?

Re: Bump2d output issue

Anonymous — Wed, 24 Jan 2018 11:05:55 GMT

Hi, Lee! I'm using bump2d, but it has no effect in beauty, but when I test it connecting directly to beauty port it seems to be ok (screenshot of that comparison attached to my first post. I'm also attaching the screenshot of my shader net just in case.screen-shot-2018-01-24-at-140222.jpg

Re: Bump2d output issue

Anonymous — Wed, 24 Jan 2018 11:09:37 GMT

Oh, it seems that my text disappeared somehow! Ok, I was saying that bump2d has no effect in beaty, so there is no bump on the model at all, but when I connect the bump channel to beauty to test it, it seems to be alright and the bump map is totally fine. It happened after I upgraded to 2.2.1, I didn't have the same issue in previous version.

Re: Bump2d output issue

lee_griggs — Wed, 24 Jan 2018 12:36:14 GMT

ok, but the first image looks like a normal map and not a grayscale bump map. Did you try a normal map shader instead?

Whereas your second 'holey' image looks like a regular bump map.

Are you able to share the maps so that we can test it this end?

Re: Bump2d output issue

Anonymous — Wed, 24 Jan 2018 12:42:56 GMT

The first image is just a bump2d shader connected directly to beauty for testing. The holy image is a regular 8 bit rgb, which worked well in previous Arnold5 version. I can upload a whole simplified scene for you to test, is it ok?

Re: Bump2d output issue

lee_griggs — Wed, 24 Jan 2018 19:27:10 GMT

If you can Denni.

Re: Bump2d output issue

Anonymous — Wed, 24 Jan 2018 21:57:42 GMT

Thank you very much for your help, Lee. Here is a file.bump2d-scene.zip

Re: Bump2d output issue

cdordelly09 — Wed, 24 Jan 2018 23:37:35 GMT

Hi @Denni Mareta! I think that you can do a better conversion of the texture with a ramp_float node to do the bump, with a black little brighter for the base color (not pure black) and do not make texture too small because maybe you can loose it with a lot of high frequency.

I attached the scene file, I hope that it work for you.

bump2d-scene.zip

Re: Bump2d output issue

Anonymous — Thu, 25 Jan 2018 19:52:18 GMT

Hi, Carlos! Thank you for your help. The thing is that everything was fine in 2.2.0 with exactly the same settings. In 2.2.1 the bump channel seems to output the correct texture, but it's totally different from what it should be in the beauty. Even my scale value looks fine in bump, but not in beauty.

Re: Bump2d output issue

lee_griggs — Fri, 26 Jan 2018 08:14:32 GMT

I created a new standard_surface shader and it works fine. I noticed your IOR value was below 1. That may be why it was not visible. Scene file here. Password: bump.

Re: Bump2d output issue

Anonymous — Thu, 01 Feb 2018 12:41:36 GMT

Lee, thank you very much! Seems it was a specular channel issue which was rewritten in a new version and worked differently comparing to the previous version.