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Maniphest T47794

Point density sometime seems streched when rendered on GPU
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Description

System Information
Operating system and graphics card
Windows seven, GPU NVIDIA GeForce GTX750 Ti

Blender Version
Broken: 2.77RC2 1e1118e

Short description of error
i've rendered 200 frames of an animation with point density on GPU, and some frames (54 exactly) have some kind of "streched" point, i've also rendered some of the faulty frames on CPU and no more streching.

GPU render :
http://i68.tinypic.com/wssnpc.png
CPU render :
http://i63.tinypic.com/1t0je0.png

Exact steps for others to reproduce the error
i don't really know how to reproduce this error, i can send you the .blend file and the N° of the frame where it appear.

Revisions and Commits

rC Cycles
rC52f6e4d04235 Fix T47794: Point density sometime seems stretched when rendered on GPU
rB Blender
rBe50d2292733b Fix T47794: Point density sometime seems stretched when rendered on GPU

Related Objects

Event Timeline

Ckiel (Ckiel) created this task.Mar 14 2016, 5:31 PM
Ckiel (Ckiel) raised the priority of this task from to 90.
Ckiel (Ckiel) updated the task description. (Show Details)
Ckiel (Ckiel) added a project: BF Blender.
Ckiel (Ckiel) edited a custom field.
Ckiel (Ckiel) added a subscriber: Ckiel (Ckiel).
Thomas Dinges (dingto) lowered the priority of this task from 90 to 30.Mar 14 2016, 5:37 PM
Thomas Dinges (dingto) added a subscriber: Thomas Dinges (dingto).

We need a blend file to reproduce the issue.

Ckiel (Ckiel) added a comment.Mar 14 2016, 5:43 PM

ok no problem, just where do i send it ?

Thomas Dinges (dingto) added a comment.Mar 14 2016, 6:02 PM

You attach it here via Drag & Drop into the comment field. Or press the "Upload File" icon above the comment field.

Ckiel (Ckiel) added a comment.Mar 14 2016, 6:08 PM

Ok thanks, the project is saved on frame 90 which produce the streched effect.

I've just upgrade my nvidia video driver, just in case, but no luck the problem is still present.

particule point density1.blend10 MBDownload

Ckiel (Ckiel) added a comment.Mar 21 2016, 7:25 AM

hello,
For info, the problem is still there in 2.77 22a2853

Bastien Montagne (mont29) raised the priority of this task from 30 to Normal.Mar 28 2016, 4:57 PM
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).
Lukas Tönne (lukastoenne) merged a task: T48007: Narrow linear artifacts in Point Density volume when rendering on GPU.Mar 31 2016, 9:05 AM
Lukas Tönne (lukastoenne) added a subscriber: Kevin Healy (astrogeek).
Lukas Tönne (lukastoenne) assigned this task to Sergey Sharybin (sergey).Mar 31 2016, 9:21 AM
Lukas Tönne (lukastoenne) added subscribers: Sergey Sharybin (sergey), Lukas Tönne (lukastoenne).

@Sergey Sharybin (sergey): I guess this is mostly your area.

Gottfried Hofmann (gottfried) added a subscriber: Gottfried Hofmann (gottfried).Mar 31 2016, 11:32 AM
Sergey Sharybin (sergey) changed the task status from Unknown Status to Resolved by committing rBe50d2292733b: Fix T47794: Point density sometime seems stretched when rendered on GPU.Apr 20 2016, 2:42 PM
Sergey Sharybin (sergey) added a commit: rBe50d2292733b: Fix T47794: Point density sometime seems stretched when rendered on GPU.
Sergey Sharybin (sergey) added a commit: rC52f6e4d04235: Fix T47794: Point density sometime seems stretched when rendered on GPU.May 8 2016, 4:34 PM