Karma XPU vs CPU Issue

Forums Technical Discussion Karma XPU vs CPU Issue

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cwrenniks: Member; 18 posts; Joined: 8月 2017; Offline

2024年10月10日 16:37

Anyone know why I'm seeing this blueish tint when using Karma XPU vs Karma CPU? All materialX shaders.

Edited by cwrenniks - 2024年10月10日 16:38:08

Attachments:
KarmaCPU.png (1.0 MB)
KarmaXPU.png (1.1 MB)


tachbek: Member; 46 posts; Joined: 2月 2017; Offline

2024年10月11日 10:53

It seems like the shadow color has changed to blue for the main light. It’s challenging to pinpoint the issue based solely on a screenshot, but consider adding an AOV – it might help identify the problematic area. Additionally, given Houdini’s transitional phase, using a newer version might resolve the problem.


brians: スタッフ; 530 posts; Joined: 5月 2019; Offline

2024年10月11日 14:41

Can you post a repro scene?


cwrenniks: Member; 18 posts; Joined: 8月 2017; Offline

2024年10月11日 21:46

I'll post tomorrow when back at my desk, but this was just the files found in https://www.sidefx.com/tutorials/usd-asset-building-with-solaris/ [www.sidefx.com]


cwrenniks: Member; 18 posts; Joined: 8月 2017; Offline

2024年10月12日 8:44

Using 20.5.370 on windows 11


cwrenniks: Member; 18 posts; Joined: 8月 2017; Offline

2024年10月12日 9:10

actually, probably easiest to just download the hip, but attached the zip for ease of use. If you check out the "Instance Decorations and Render" box, that is the full scene.

Attachments:
USD_AssetBuilding_with_Solaris.zip (534.5 KB)


cwrenniks: Member; 18 posts; Joined: 8月 2017; Offline

2024年10月12日 21:28

Verified that this still happens on 20.5.384


pandalay: Member; 2 posts; Joined: 12月 2013; Offline

2024年10月17日 21:06

Adding light filter gel for light fixes tint somehow, and it's not just shadow.

Image Not Found

Attachments:
xpu_shadow_0_light_filter_gel.jpg (124.7 KB)


pandalay: Member; 2 posts; Joined: 12月 2013; Offline

2024年10月18日 11:17

There is some issue with latest nvidia drivers and XPU, rolling back to older studio driver version fixed problem.


chrism: スタッフ; 2544 posts; Joined: 9月 2007; Offline

2024年10月18日 11:25

Thanks! For future reference....
https://www.sidefx.com/forum/topic/70943/ [www.sidefx.com]

Chris McSpurren
Senior Quality Assurance Specialist
SideFX


cwrenniks: Member; 18 posts; Joined: 8月 2017; Offline

2024年11月8日 16:09

Just to close this down, I'm not seeing this problem in the latest production build ( 20.5.410 ). Thanks!


brians: スタッフ; 530 posts; Joined: 5月 2019; Offline

2024年11月12日 5:27

cwrenniks
I'm not seeing this problem in the latest production build ( 20.5.410)

More details here
https://www.sidefx.com/forum/topic/98442/ [www.sidefx.com]


Xue_Yue: Member; 65 posts; Joined: 6月 2016; Offline

2024年11月15日 9:54

I had the exact same issue, and lowering the "specular multiplier" on the light to ~0.95 solved the blue tint.

But good to know that it is resolved now.

Edited by Xue_Yue - 2024年11月15日 09:57:55

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