question

sk x avatar image
sk x asked ·

can someone explain why this Shader renders wrong on GPU?

Rubber Material renders probably on CPU with Arnold 5.4.0.0 C4DtoA 2.6.0



same Rubber Material with GPU Arnold 5.4.0.0 C4DtoA 2.6.0




Node

arnold-shader-network-editor.jpg


Scene Files

c4dtoa-gpu-rubber-material-test-scene.zip
hdr.zip

shadersgpushaderarnold gpu betaramp
rubber-material-cpu-arnold-5400-c4dtoa-260.jpg (166.2 KiB)
rubber-material-gpu-arnold-5400-c4dtoa-260.jpg (192.0 KiB)
arnold-shader-network-editor.jpg (221.4 KiB)
c4dtoa-gpu-rubber-material-test-scene.zip (1.8 MiB)
hdr.zip (527.1 KiB)
10 |600 characters needed characters left characters exceeded
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

4 Answers

· Write an Answer
Adrien Herubel avatar image
Adrien Herubel answered · ACCEPTED ANSWER

Hi, we found the issue there is a bug in how the tscale parameter is handled on the image node. This is tracked internally in #8758, and should be fixed in an upcoming bugfix release.

Share
10 |600 characters needed characters left characters exceeded
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Mike Samoylov avatar image
Mike Samoylov answered · 
ramp_rgb Connected colors and positions not supported.

https://docs.arnoldrenderer.com/display/A5ARP/Supported+Features+and+Known+Limitations

I think that's why ...

1 comment Share
10 |600 characters needed characters left characters exceeded
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

sk x avatar image sk x ·

Yeah I guess, well, I have no idea how that one flew over my head.

0 Likes 0 · ·
sk x avatar image
sk x answered ·

Thanks for having a look.

FYI
Windows 10
GeForce RTX2070
NVIDIA Studio Drivers 431.70
Optix 6.0

rubber-material.ass


rubber-material.ass (176.5 KiB)
Share
10 |600 characters needed characters left characters exceeded
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Declan Russell avatar image
Declan Russell answered ·

I'm not seeing anything that sticks out in the shading network. Could you export this to an .ass file for me please? I don't have C4D to hand.

Share
10 |600 characters needed characters left characters exceeded
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Write an Answer

Hint: Notify or tag a user in this post by typing @username.

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Welcome to the Arnold Answers community.

This is the place for Arnold renderer users everywhere to ask and answer rendering questions, and share knowledge about using Arnold, Arnold plugins, workflows and developing tools with Arnold.

If you are a new user to Arnold Answers, please first check out our FAQ and User Guide for more information.

When posting questions, please be sure to select the appropriate Space for your Arnold plugin and include the plugin version you are using.

Please include images, scene and log files whenever possible as this helps the community answer your questions.

Instructions for generating full verbosity log files are available for MtoA, MaxtoA, C4DtoA, HtoA, KtoA, and Kick.

If you are looking for Arnold Documentation and Support please visit the Arnold Support site.

To try Arnold please visit the Arnold Trial page.

Bottom No panel present for this section.