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Maniphest T43458

Freezing and Crashing Wings
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Description

System Information
64bit Manjaro Linux, kernel 3.14.29
CPU: AMD Phenom II 970 Deneb quad-core
GPU: nVidia GTX 650 Ti, driver 343.36

Blender Version
Broken: 2.73 devel, hash 59e2f91

Short description of error
This particular scene exhibits crashes whenever the feathers use a material containing some nebulous combination of non-diffuse shader nodes. In this particular case, a mix node with transmission and reflective Hair BSDF nodes.

When using one of the latest builds off of buildbot, this crash occurs only when rendering in CPU mode. GPU mode works just fine. The 2.73 release version behaves differently, however (and 2.73a as well, most likely). CPU mode takes an obscene amount of time to render tiles containing ParticleSystem1 on the wing arms (8:15 minutes with the particle system enabled, 12 seconds with it disabled), while GPU mode freezes the GPU itself upon switching to the 2nd tile, requiring a reboot.

Above, I note that the 2.73 release version "sort of" works. By that, I mean instead of crashing, it takes an obscene amount of time to render tiles containing hairs from a specific particle system on the wing "arms". Total render time is 8:15 minutes, and disabling the trouble particle system (ParticleSystem1 on the arms) reduces the render time to 12 seconds.

Exact steps for others to reproduce the error

  1. Open this blend file:
    WingRigging_r8.blend939 KBDownload
  2. Render

Revisions and Commits

rC Cycles
rC2c9861a777d7 Fix T43458: Crashes with hair transmission BSDF
rB Blender
rBbd10b72ad38e Fix T43458: Crashes with hair transmission BSDF

Related Objects

Event Timeline

Zauber Paracelsus (zauberexonar) created this task.Jan 29 2015, 6:17 AM
Zauber Paracelsus (zauberexonar) raised the priority of this task from to 90.
Zauber Paracelsus (zauberexonar) updated the task description. (Show Details)
Zauber Paracelsus (zauberexonar) added a project: BF Blender.
Zauber Paracelsus (zauberexonar) edited a custom field.
Zauber Paracelsus (zauberexonar) added a subscriber: Zauber Paracelsus (zauberexonar).
Zauber Paracelsus (zauberexonar) added a comment.Jan 29 2015, 6:23 AM

Last paragraph before the repro steps should be ignored, forgot to delete it after rewriting the description.

Antonis Ryakiotakis (psy-fi) assigned this task to Sergey Sharybin (sergey).Jan 29 2015, 4:30 PM
Antonis Ryakiotakis (psy-fi) added subscribers: Sergey Sharybin (sergey), Antonis Ryakiotakis (psy-fi).

Latest master on release builds works OK here and even faster than 2.73 but debug builds get an abort signal from operating system...not sure what to do with this. @Sergey Sharybin (sergey) will know what to do here

Bastien Montagne (mont29) lowered the priority of this task from 90 to Normal.Jan 29 2015, 9:06 PM
Bastien Montagne (mont29) added a project: Cycles.
Zauber Paracelsus (zauberexonar) added a comment.Jan 29 2015, 9:22 PM

In case it's useful, here is the command line output I received during the crash:

Stepped out of update shape due to exception.
write exr tmp file, 512x512, /tmp/blender_Uq1lKF/WingRigging_r8_blend_Scene_RenderLayer_exr
Writing: /tmp/WingRigging r8.crash.txt
Segmentation fault

The specified crash log is empty.

Sergey Sharybin (sergey) changed the task status from Unknown Status to Resolved.Jan 30 2015, 11:14 AM
Sergey Sharybin (sergey) added a commit: rBbd10b72ad38e: Fix T43458: Crashes with hair transmission BSDF.

Closed by commit rBbd10b72ad38e.

Sergey Sharybin (sergey) added a commit: rC2c9861a777d7: Fix T43458: Crashes with hair transmission BSDF.Jan 30 2015, 9:59 PM