Mixing Reflection/Transmission in node editor for Cycles renderer causes crash #49448

New Issue

andrew · 2016-09-25T16:06:29+02:00

andrew commented

2016-09-25 16:06:29 +02:00

System Information
Ubuntu16.04
Radeon R9 290x
FX-8150
(don't call me a fanboy)

Ubuntu "extra drivers" utility doesn't tell what graphics drivers I have installed. Since this is a fresh install, I am assuming it's the OSS drivers. It does, however say that I am not using the "processor microcode firmware". I will re-test later to see if this helps in any way.

Blender Version
2.76b

Short description of error
Mixing "transmission" and "reflection" in node editor and rendering either through side panel preview or main cycles renderer results in crash. CUDA render is not in effect; CPU only. Command line reads:

"blender: /build/blender-40PcOX/blender-2.76.b+dfsg0/intern/cycles/kernel/./closure/../closure/bsdf_hair.h:247: int ccl::bsdf_hair_transmission_sample(const ShaderClosure*, ccl::float3, ccl::float3, ccl::float3, ccl::float3, float, float, ccl::float3*, ccl::float3*, ccl::float3*, ccl::float3*, float*): Assertion `dot(locy, *omega_in) < 0.0f' failed.
Aborted (core dumped)"

Exact steps for others to reproduce the error
Open .blend file
Switch to "3D view" (preview render is on)
This is enough to reproduce my circumstances. crash.blend

**System Information** Ubuntu16.04 Radeon R9 290x FX-8150 (don't call me a fanboy) Ubuntu "extra drivers" utility doesn't tell what graphics drivers I have installed. Since this is a fresh install, I am assuming it's the OSS drivers. It does, however say that I am not using the "processor microcode firmware". I will re-test later to see if this helps in any way. **Blender Version** 2.76b **Short description of error** Mixing "transmission" and "reflection" in node editor and rendering either through side panel preview or main cycles renderer results in crash. CUDA render is not in effect; CPU only. Command line reads: "blender: /build/blender-40PcOX/blender-2.76.b+dfsg0/intern/cycles/kernel/./closure/../closure/bsdf_hair.h:247: int ccl::bsdf_hair_transmission_sample(const ShaderClosure*, ccl::float3, ccl::float3, ccl::float3, ccl::float3, float, float, ccl::float3*, ccl::float3*, ccl::float3*, ccl::float3*, float*): Assertion `dot(locy, *omega_in) < 0.0f' failed. Aborted (core dumped)" **Exact steps for others to reproduce the error** Open .blend file Switch to "3D view" (preview render is on) This is enough to reproduce my circumstances. [crash.blend](https://archive.blender.org/developer/F367917/crash.blend)

andrew commented

2016-09-25 16:06:29 +02:00

Changed status to: 'Open'

andrew commented

2016-09-25 16:06:29 +02:00

Added subscriber: @Dozerman

andrew commented

2016-09-25 16:09:45 +02:00

Correction: crash.blend requires you to render somehow. I forgot to turn on the preview render, so just going to 3D View will not reproduce results. Using processor microcode just seemed to make it crash harder. CLI output was the same.

Sergey Sharybin commented

2016-09-26 10:04:17 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2016-09-26 10:04:17 +02:00

You've got assertion failure, which are only expected to happen in development builds. Those indicate some numerical issues for developers, but only might give slightly wrong render results.

Also, 2.76 it somewhat old now. Try using .277 release which is currently most recent stable one. You can also test if the crash exists in 2.78-rc2 from http://download.blender.org/release/Blender2.78/ (soon we'll have 2.78 release).

You've got assertion failure, which are only expected to happen in development builds. Those indicate some numerical issues for developers, but only might give slightly wrong render results. Also, 2.76 it somewhat old now. Try using .277 release which is currently most recent stable one. You can also test if the crash exists in 2.78-rc2 from http://download.blender.org/release/Blender2.78/ (soon we'll have 2.78 release).

Vuk Gardašević commented

2016-09-26 19:12:04 +02:00

Added subscriber: @VukGardasevic

Vuk Gardašević commented

2016-09-26 19:12:04 +02:00

Why is this tagged as Addons?

Julian Eisel commented

2016-10-03 15:35:35 +02:00

Added subscriber: @JulianEisel

Julian Eisel commented

2016-10-03 15:35:35 +02:00

Changed status from 'Open' to: 'Archived'

Julian Eisel closed this issue

2016-10-03 15:35:35 +02:00

Julian Eisel self-assigned this 2016-10-03 15:35:35 +02:00

Julian Eisel commented

2016-10-03 15:35:35 +02:00

No answer since a week, closing the report. We can reopen after requested information was added.
(Also note that in the meanwhile Blender 2.78 was released, please use this for testing.)

No answer since a week, closing the report. We can reopen after requested information was added. (Also note that in the meanwhile [Blender 2.78 ](https://www.blender.org/features/2-78/) was released, please use this for testing.)

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Mixing Reflection/Transmission in node editor for Cycles renderer causes crash #49448