BC1 compressed textures incur frequent crashes

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Maxon Cinema 4D (Export script developed by abstrax, Integrated Plugin developed by aoktar)

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BC1 compressed textures incur frequent crashes

Postby ValentinMoebs » Tue Sep 03, 2019 9:17 am

ValentinMoebs Tue Sep 03, 2019 9:17 am
Hello all,

I've run into a problem working on a scene with 177 materials, and a total of about 540 textures. I was previously having trouble (as you can imagine) with VRAM consumption and so started switching all greyscale textures to float, and then all RGB textures to BC1 compression, RGBA to BC3 and HDRi to BC6. About a third of all textures are greyscale, the overwhelming majority of the rest is simple RGB.

I was about halfway switching the RGB textures over to BC1 compression when I started getting recurring crashes. In between crashes and with frequent saves I managed to get two thirds of the RGB textures switched over to BC1 compression. Now the file is very unstable, and Octane hangs while trying to generate materials.

The VRAM savings are very impressive, I'd like to avoid having to remove the compression if possible - is this inherent in using compressed textures or is a workaround possible ?

Thanks,
Valentin
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Re: BC1 compressed textures incur frequent crashes

Postby aoktar » Tue Sep 03, 2019 9:42 am

aoktar Tue Sep 03, 2019 9:42 am
Which version of plugin do you use? Did you try with latest builds?
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Re: BC1 compressed textures incur frequent crashes

Postby ValentinMoebs » Tue Sep 03, 2019 10:00 am

ValentinMoebs Tue Sep 03, 2019 10:00 am
Hey aoktar, thanks for your reply - I'm currently using V4.02.1-R3, although I'll try switching to a newer build next.
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Re: BC1 compressed textures incur frequent crashes

Postby aoktar » Tue Sep 03, 2019 10:12 am

aoktar Tue Sep 03, 2019 10:12 am
ValentinMoebs wrote:Hey aoktar, thanks for your reply - I'm currently using V4.02.1-R3, although I'll try switching to a newer build next.

Always do that because newer versions have fixes. Best!
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Re: BC1 compressed textures incur frequent crashes

Postby ValentinMoebs » Tue Sep 03, 2019 11:40 am

ValentinMoebs Tue Sep 03, 2019 11:40 am
Hey aoktar, thanks again for that sound advice. Unfortunately I switched to V4.05-R2 and the file keeps crashing the plugin very frequently - frequently enough that as-is, it is impossible to work on. While before it was still handling crashes gracefully, now C4D freezes when changing the material displayed in the node editor or while makign changes to the scene while live view is active. Any other ideas ?
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Re: BC1 compressed textures incur frequent crashes

Postby aoktar » Tue Sep 03, 2019 12:00 pm

aoktar Tue Sep 03, 2019 12:00 pm
ValentinMoebs wrote:Hey aoktar, thanks again for that sound advice. Unfortunately I switched to V4.05-R2 and the file keeps crashing the plugin very frequently - frequently enough that as-is, it is impossible to work on. While before it was still handling crashes gracefully, now C4D freezes when changing the material displayed in the node editor or while makign changes to the scene while live view is active. Any other ideas ?

Is it happening in specific scene or every scene? What happen if you disable node previews from settings?
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Re: BC1 compressed textures incur frequent crashes

Postby ValentinMoebs » Tue Sep 03, 2019 12:09 pm

ValentinMoebs Tue Sep 03, 2019 12:09 pm
It is happening only in this specific scene, and only since I started using VRAM texture compression. I tried working with disabled node previews, but the plugin just crashed again - gracefully this time.
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Re: BC1 compressed textures incur frequent crashes

Postby aoktar » Tue Sep 03, 2019 12:18 pm

aoktar Tue Sep 03, 2019 12:18 pm
ValentinMoebs wrote:It is happening only in this specific scene, and only since I started using VRAM texture compression. I tried working with disabled node previews, but the plugin just crashed again - gracefully this time.

Could you show render log outputs(c4doctanelog.txt and bugreport.zip) and a screenshot from crash moment as in picture?
Attachments
a1.jpg
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Re: BC1 compressed textures incur frequent crashes

Postby ValentinMoebs » Tue Sep 03, 2019 12:34 pm

ValentinMoebs Tue Sep 03, 2019 12:34 pm
Thanks aoktar, here are the log and the screenshot :
Attachments
octane_crash.PNG
c4doctanelog.txt
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Re: BC1 compressed textures incur frequent crashes

Postby aoktar » Tue Sep 03, 2019 1:41 pm

aoktar Tue Sep 03, 2019 1:41 pm
May I get bugreport.zip also?
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