OptiX render fails with scene with many translucent planes on Linux. #72470

New Issue

Chris M · 2019-12-16T05:52:01+01:00

Chris M commented

2019-12-16 05:52:01 +01:00

System Information
Operating system: Linux-5.3.0-24-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce RTX 2080 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: f1aa4d18d4
Worked: (optional)

Short description of error
I have a scene based the CGGeek forest tutorial (https://www.youtube.com/watch?v=72LPW4S8bns) where OptiX fails to render about halfway through with:
OptiX CUDA error CUDA_ERROR_ILLEGAL_ADDRESS in cuStreamSynchronize(cuda_stream[thread_index]), line 671

It renders fine when CUDA is selected in preferences, and viewport renders also work fine.

There are many transparent or translucent planes in the scene, and Max Bounces for Transparency is set to 128. Reducing the number of objects or turning Max Bounces down makes the error go away.

Exact steps for others to reproduce the error
forest_bugreport.blend

Download and open the attached .blend file.
In Preferences, select OptiX under Cycles Render Devices.
Render the scene. You should see the error about half way through.

**System Information** Operating system: Linux-5.3.0-24-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce RTX 2080 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44 **Blender Version** Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: `f1aa4d18d4` Worked: (optional) **Short description of error** I have a scene based the CGGeek forest tutorial (https://www.youtube.com/watch?v=72LPW4S8bns) where OptiX fails to render about halfway through with: OptiX CUDA error CUDA_ERROR_ILLEGAL_ADDRESS in cuStreamSynchronize(cuda_stream[thread_index]), line 671 It renders fine when CUDA is selected in preferences, and viewport renders also work fine. There are many transparent or translucent planes in the scene, and Max Bounces for Transparency is set to 128. Reducing the number of objects or turning Max Bounces down makes the error go away. **Exact steps for others to reproduce the error** [forest_bugreport.blend](https://archive.blender.org/developer/F8224794/forest_bugreport.blend) 1. Download and open the attached .blend file. 2. In Preferences, select OptiX under Cycles Render Devices. 3. Render the scene. You should see the error about half way through.

Chris M commented

2019-12-16 05:52:01 +01:00

Added subscriber: @cmal

Philipp Oeser commented

2019-12-17 15:25:48 +01:00

Added subscribers: @pmoursnv, @lichtwerk

Philipp Oeser commented

2019-12-17 15:25:48 +01:00

@pmoursnv: cant check here [no RTX], can you confirm?

Patrick Mours commented

2020-01-10 15:39:33 +01:00

Can reproduce. Happens because OptiX always uses record-all behavior for shadow rays, which uses a fixed stack of 64 hits, which is exceeded with 128 bounces. Will commit a fix later.

blender-admin commented

2020-01-10 15:42:44 +01:00

This issue was referenced by blender/cycles@b5008f5790

This issue was referenced by blender/cycles@b5008f579057f2408c29ff4f518e32b5b3c1911e

blender-admin commented

2020-01-10 15:42:44 +01:00

This issue was referenced by 1d149f6746

This issue was referenced by 1d149f6746a00cb49df202b1c49fcff4264dd226

Patrick Mours commented

2020-01-10 15:53:34 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Resolved'

Patrick Mours closed this issue

2020-01-10 15:53:34 +01:00

Patrick Mours self-assigned this 2020-01-10 15:53:34 +01:00

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OptiX render fails with scene with many translucent planes on Linux. #72470