Cycles doesn't render shadows when using the 360 stereo camera on the SSE4.1 kernel #48749

New Issue

Planet · 2016-06-28T00:41:35+02:00

Planet commented

2016-06-28 00:41:35 +02:00

System Information
Intel Xeon X5472 3Ghz
32GB RAM
CentOS 6.5-x64
NVIDIA Quadro M5000

Blender Version
Broken: 2.77 and 2.77.a

Short description of error
When rendering a scene using the a 360 degree stereo camera in Cycles, shadows don't get rendered on certain CPUs. Specifically it seems when Cycles uses the SSE4.1 kernel the shadows don't get rendered. The shadows get rendered properly when Cycles uses the AVX2 kernel. In case it's relevant, the leaves in the included .blend file use transparency maps.

Exact steps for others to reproduce the error

Open included blend file.
Render frame 718 on a CPU that doesn't have the AVX2 instruction set like this:
blender -b yuccas_clean3.blend -s 718 -e 718 -o test.#####.exr -F MULTILAYER -x 1 --debug-cycles -t 8 -a -t 8
Open the resulting EXR file.

For comparison, run the command on a machine that does have the AVX2 instruction set and then compare the two images. Note, since this is a stereo render you'll have left and right image files.

yuccas_clean3.blend

**System Information** Intel Xeon X5472 3Ghz 32GB RAM CentOS 6.5-x64 NVIDIA Quadro M5000 **Blender Version** Broken: 2.77 and 2.77.a **Short description of error** When rendering a scene using the a 360 degree stereo camera in Cycles, shadows don't get rendered on certain CPUs. Specifically it seems when Cycles uses the SSE4.1 kernel the shadows don't get rendered. The shadows get rendered properly when Cycles uses the AVX2 kernel. In case it's relevant, the leaves in the included .blend file use transparency maps. **Exact steps for others to reproduce the error** 1. Open included blend file. 2. Render frame 718 on a CPU that doesn't have the AVX2 instruction set like this: blender -b yuccas_clean3.blend -s 718 -e 718 -o test.#####.exr -F MULTILAYER -x 1 --debug-cycles -t 8 -a -t 8 3. Open the resulting EXR file. For comparison, run the command on a machine that does have the AVX2 instruction set and then compare the two images. Note, since this is a stereo render you'll have left and right image files. [yuccas_clean3.blend](https://archive.blender.org/developer/F318804/yuccas_clean3.blend)

Planet commented

2016-06-28 00:41:35 +02:00

Changed status to: 'Open'

Planet commented

2016-06-28 00:41:35 +02:00

Added subscriber: @EE-2

Sergey Sharybin commented

2016-06-28 08:43:19 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2016-06-28 08:43:19 +02:00

Can reproduce the issue with official releases, btu can not reproduce with latest builds from builder.blender.org.

Please grab latest build from buildbot and check if the issue still happens for you.

Can reproduce the issue with official releases, btu can not reproduce with latest builds from builder.blender.org. Please grab latest build from buildbot and check if the issue still happens for you.

Sergey Sharybin commented

2016-06-28 13:28:28 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2016-06-28 13:28:28 +02:00

Sergey Sharybin self-assigned this 2016-06-28 13:28:28 +02:00

Sergey Sharybin commented

2016-06-28 13:28:28 +02:00

Ok, traced the issue a bit more. It was fixed by 980f3c3.

So unless latest builds are still broken for you considering the report solved :)

Ok, traced the issue a bit more. It was fixed by 980f3c3. So unless latest builds are still broken for you considering the report solved :)

Planet commented

2016-06-28 20:16:35 +02:00

I just tested the newest build from last night and confirmed that the issue is indeed fixed. Thank you!

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Cycles doesn't render shadows when using the 360 stereo camera on the SSE4.1 kernel #48749