Smoke domain's edges visible on CPU render #48805

New Issue

Lukasz Czyz · 2016-07-07T15:55:15+02:00

Lukasz Czyz commented

2016-07-07 15:55:15 +02:00

System Information
Windows 7
Intel Core i5-3360M
Integrated GPU

Blender Version
Broken: 2.77a
Worked: 2.71

Short description of error
During Smoke Domain rendering wireframe is visible as edge artifacts. It is confirmed for CPU render. Some users report that the issue is not present when rendering on GPU, see: https://blenderartists.org/forum/showthread.php?401907-Smoke-domain-s-wireframe-visible-on-render

Exact steps for others to reproduce the error
Open attached blend file in Blender 2.77a. Run smoke simulation for a few frames (about 10-20). Render the result on CPU.

{F319980}smoke.issue2.blend

**System Information** Windows 7 Intel Core i5-3360M Integrated GPU **Blender Version** Broken: 2.77a Worked: 2.71 **Short description of error** During Smoke Domain rendering wireframe is visible as edge artifacts. It is confirmed for CPU render. Some users report that the issue is not present when rendering on GPU, see: https://blenderartists.org/forum/showthread.php?401907-Smoke-domain-s-wireframe-visible-on-render **Exact steps for others to reproduce the error** Open attached blend file in Blender 2.77a. Run smoke simulation for a few frames (about 10-20). Render the result on CPU. {[F319980](https://archive.blender.org/developer/F319980/smoke.issue2.png)}[smoke.issue2.blend](https://archive.blender.org/developer/F319979/smoke.issue2.blend)

Lukasz Czyz commented

2016-07-07 15:55:15 +02:00

Changed status to: 'Open'

Lukasz Czyz commented

2016-07-07 15:55:15 +02:00

Added subscriber: @glukoz

Sergey Sharybin commented

2016-07-07 16:25:57 +02:00

Added subscriber: @Sergey

Sergey Sharybin self-assigned this 2016-07-07 16:25:57 +02:00

Sergey Sharybin commented

2016-07-07 16:25:57 +02:00

Will have a closer look later,

Lukas Stockner commented

2016-07-08 05:01:15 +02:00

Added subscriber: @LukasStockner

Lukas Stockner commented

2016-07-08 05:01:15 +02:00

I can't reproduce the issue (I tested frames 20 and 25) on Linux Mint 17.3 on a FX8350 with commit 04b3d68.
I also tested without SSE/AVX and without QBVH, still no artifacts.
So, I'd guess this is another volume bug that depends on some undefined behaviour, but the SIGFPE patch doesn't produce any signals either...

I can't reproduce the issue (I tested frames 20 and 25) on Linux Mint 17.3 on a FX8350 with commit 04b3d68. I also tested without SSE/AVX and without QBVH, still no artifacts. So, I'd guess this is another volume bug that depends on some undefined behaviour, but the SIGFPE patch doesn't produce any signals either...

Sergey Sharybin commented

2016-07-08 11:27:17 +02:00

@LukasStockner, i can reproduce the issue. It might be same as #46108 -- ray hits a very corner and being pushed outside of the volume by the ray_offset(). But will need to run some actual tests about this.

@LukasStockner, i can reproduce the issue. It might be same as #46108 -- ray hits a very corner and being pushed outside of the volume by the `ray_offset()`. But will need to run some actual tests about this.

Sergey Sharybin commented

2016-08-24 12:25:51 +02:00

I can no longer reproduce the issue with latest Git versions.

@glukoz, please test latest builds from builder.blender.org to see if the issue still happens for you.

I can no longer reproduce the issue with latest Git versions. @glukoz, please test latest builds from builder.blender.org to see if the issue still happens for you.

Sergey Sharybin commented

2016-09-01 10:51:29 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2016-09-01 10:51:29 +02:00

Sergey Sharybin commented

2016-09-01 10:51:29 +02:00

There was now 5 days without reply. Archiving for until requested information is provided.

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Smoke domain's edges visible on CPU render #48805