Artifacts and crashes when rendering trails as hair 4.05

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Artifacts and crashes when rendering trails as hair 4.05

Postby byMELT » Sun Feb 02, 2020 12:23 pm

byMELT Sun Feb 02, 2020 12:23 pm
Hello,

This past week has been horrible with every scene consisting of trails rendering as hair has crashed a lot and had many frames with artifacts. We use x-particles trails, but it also happens when they are baked to alembic.

It happens in different scenes, on 3 different machines with different OS (2x win10 and win 7).

Octane 4.05-R7, C4D R20 and R21

It happens in both complex and simple scenes.

Here are some examples:
https://imgur.com/a/IddyFDa

Bug report from recent crash:
_BugReport.zip
(126.72 KiB) Downloaded 33 times


What to do? I can't go back to Octane 3 (this scene rendered just fine couple years back).
byMELT
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Re: Artifacts and crashes when rendering trails as hair 4.05

Postby aoktar » Sun Feb 02, 2020 2:37 pm

aoktar Sun Feb 02, 2020 2:37 pm
It's a crash on the renderer not plugin. Please post a sample scene and description how you get crashes. Also what's your driver version?
And what's artefacts you see, mark in pictures
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Re: Artifacts and crashes when rendering trails as hair 4.05

Postby byMELT » Sun Feb 02, 2020 3:47 pm

byMELT Sun Feb 02, 2020 3:47 pm
Hey Ahmet, thanks for getting back.

Sample scene here:
BUG_TRAILS.zip
sample scene
(122.5 KiB) Downloaded 31 times


Marked pictures:
Untitled presentation.pdf
marked pictures
(1.69 MiB) Downloaded 32 times


Video with artifacts: https://vimeo.com/388826026/497140529b - particles are still small and slow, so everything you see are artifacts. this scene rendered fine a couple years ago.

Crashes are scene dependent and can happen every few or every few hundred frames. The artifacts are way worse to deal with as nothing helps - no baking, alembic, changing object to hair, nothing.

Drivers:
1st machine: 419.67, win 10, R20
2nd machine: 441.20, win 10, R21
3rd machine: 419.67, win 7, R20

I found 419.67 to be the most stable for my work.

Best,
MELT
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