geometry is not visible in arnold render

[Faiznaqvi]

Hello Guys,

i'm facing the issue.
once i'm going to bind the skin with Geodesic Voxel with Bones.
and render the scene.
the bind skined not visible in render.
 see the attached picture.
and please let me know is there any solution

thanks

[Kahylan]

Hi!

Skinning should not have anything to do with rendering, so the problem isn't there.

Do you have any Arnold lights in your scene?

[Faiznaqvi]

yes.
 and the problem with only that geometry which is bind by Geodestic voxel.
other asset shows in render like hair n eyes n eye brow.
only that geometry

[Faiznaqvi]

yes i setup the lightining 
 and the problem with only that geometry which is bind by Geodestic voxel.
other asset shows in render like hair n eyes n eye brow.
only that geometry.

[Kahylan]

Hmm... that is weird. could you attacht the scenefile as a zipped .ma so I can have a look at it?

[Faiznaqvi]

see the attached image.

[Faiznaqvi]

even the other bind method works on it.
except geodesic voxel.

[Faiznaqvi]

share the email.
i'll send to you

[Kahylan · Accepted solution]

Ok, so I took a look at the file. I already wrote you this in an Email, but I thought it would be worth mentioning here for people that run into the same problem.

For Geodesic Voxel to work ok, you need to have clean geometry. most importantly

1) No Nonmanifold Geometry

2) No Laminafaces

3) No Faces with zero geometric area

4) No Faces with zero map area

The last one was the problem here, since there were Faces in the Neck, Hands and Knees that did not have map area.

This caused a nan bug which also caused this Warning whenever a render was started:

// Warning: resetting parameter vlist on /Bell_Hus_Body/Bell_Hus_BodyShape (found: nans or infs) // 

UV Mapping the Model before using Geodesic Voxel fixed the problem, atleast on my end.

EDIT:

For some reason giving the model new UV's worked the first time, but when I tried to reproduce the process to make a short video about how to do it, I could not reproduce it. So instead I fixed the nan issue directly...

1) Saved file in .ma

2) opened the .ma file in a Texteditor

3) used search and replace to search " nan" with " 0"

All the nan values were in the delta values of vertices in the skincluster and just 6 vertices were affected. I looked at them and could not find anything special, apart from the fact that they belonged to very small faces and had a small uv area. I'm not quite sure why this happened and I'm also not sure why giving new UV's worked once but didn't when I tried it a second time on the same file...

[Faiznaqvi]

[brasslark]

Thank you so much. The NAN errors were causing my mesh to totally disappear if I changed anything in the blendshape editor. It would have been hours of work down the drain. After trying to find an answer after 6 hours and going through 50 posts that provided absolutely no clues, I was willing to try anything. But this would have been the last thing I would have ever thought to try. I'm kind of in shock that it actually worked.