Optix fails to render an object scaled to zero with armature modifier and motion blur enabled #98497

New Issue

Marcin Twarowski · 2022-05-30T15:12:14+02:00

Marcin Twarowski commented

2022-05-30 15:12:14 +02:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.95

Tested also on:

NVIDIA TITAN RTX/PCIe/SSE2 4.5.0 NVIDIA 512.96
3.2.0, branch: master, commit date: 2022-06-07 18:03, hash: 2161a892519e, type: release build date: 2022-06-08, 00:04:42
Windows-10-10.0.19042-SP0

Blender Version
Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-05-29 19:25, hash: 3c0d7152c8
Also broken: version: 3.1.2, branch: master, commit date: 2022-03-31 17:40, hash: cc66d1020c

Short description of error
Object has animated scale from 0 to 1. It has armature modifier. Motion blur is on. Rendering the first frame where object has scale 0,0,0 using Optix causes Blender to hang. Rendering with Cuda is fine. CPU rendering also works.

Exact steps for others to reproduce the error

See attached file.
optix_zero_scale_motion_blur_bug.blend
Make sure you are set to Optix and GPU in Edit > Preferences > System.
Start rendering frame 1 where cube is scaled to 0.

EDIT: Here's an example that fails with RTX 3080 ti. This one is using geometry nodes:
geometry_nodes_optix_bug.blend

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.95 Tested also on: ``` NVIDIA TITAN RTX/PCIe/SSE2 4.5.0 NVIDIA 512.96 3.2.0, branch: master, commit date: 2022-06-07 18:03, hash: 2161a892519e, type: release build date: 2022-06-08, 00:04:42 Windows-10-10.0.19042-SP0 ``` **Blender Version** Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-05-29 19:25, hash: `3c0d7152c8` Also broken: version: 3.1.2, branch: master, commit date: 2022-03-31 17:40, hash: `cc66d1020c` **Short description of error** Object has animated scale from 0 to 1. It has armature modifier. Motion blur is on. Rendering the first frame where object has scale 0,0,0 using Optix causes Blender to hang. Rendering with Cuda is fine. CPU rendering also works. **Exact steps for others to reproduce the error** - See attached file. [optix_zero_scale_motion_blur_bug.blend](https://archive.blender.org/developer/F13123034/optix_zero_scale_motion_blur_bug.blend) - Make sure you are set to Optix and GPU in Edit > Preferences > System. - Start rendering frame 1 where cube is scaled to 0. EDIT: Here's an example that fails with RTX 3080 ti. This one is using geometry nodes: [geometry_nodes_optix_bug.blend](https://archive.blender.org/developer/F13303827/geometry_nodes_optix_bug.blend)

Marcin Twarowski commented

2022-05-30 15:12:14 +02:00

Added subscriber: @MarcinTwarowski

Marcin Twarowski commented

2022-06-06 13:34:00 +02:00

I have impression that this report fell through the cracks :)

Richard Antalik commented

2022-06-07 18:56:27 +02:00

Added subscriber: @iss

Richard Antalik commented

2022-06-07 18:56:27 +02:00

I wasn't able to reproduce with
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.650
Tested with same 3.3 build

I wasn't able to reproduce with Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.650 Tested with same 3.3 build ![Untitled.png](https://archive.blender.org/developer/F13137093/Untitled.png)

Marcin Twarowski commented

2022-06-08 00:41:58 +02:00

Just tested with

Windows-10-10.0.19044-SP0 64 Bits
NVIDIA GeForce RTX 3080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.95

Renders without a problem. Maybe it's a problem with older cards then. I'll test 1080 again tomorrow with newest build.

Just tested with ``` Windows-10-10.0.19044-SP0 64 Bits NVIDIA GeForce RTX 3080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.95 ``` Renders without a problem. Maybe it's a problem with older cards then. I'll test 1080 again tomorrow with newest build.

Marcin Twarowski commented

2022-06-08 13:51:22 +02:00

@iss Tested on 1080 with today's build and it's the same. Blender stops responding.

3.3.0 Alpha, branch: master, commit date: 2022-06-07 18:08, hash: `rB173a15bcda8f`

Also tested with:

NVIDIA TITAN RTX/PCIe/SSE2 4.5.0 NVIDIA 512.96
3.2.0, branch: master, commit date: 2022-06-07 18:03, hash: 2161a892519e, type: release build date: 2022-06-08, 00:04:42
Windows-10-10.0.19042-SP0

Same problem. Blender starts thinking but nothing happens.

@iss Tested on 1080 with today's build and it's the same. Blender stops responding. ``` 3.3.0 Alpha, branch: master, commit date: 2022-06-07 18:08, hash: `rB173a15bcda8f` ``` Also tested with: ``` NVIDIA TITAN RTX/PCIe/SSE2 4.5.0 NVIDIA 512.96 3.2.0, branch: master, commit date: 2022-06-07 18:03, hash: 2161a892519e, type: release build date: 2022-06-08, 00:04:42 Windows-10-10.0.19042-SP0 ``` Same problem. Blender starts thinking but nothing happens.

Richard Antalik commented

2022-06-08 14:18:12 +02:00

Added subscriber: @rjg

Richard Antalik commented

2022-06-08 14:18:12 +02:00

@rjg can you check this?

Robert Guetzkow commented

2022-06-08 15:28:20 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Robert Guetzkow commented

2022-06-08 15:28:20 +02:00

@iss I can confirm that it hangs when rendering on a NVIDIA GeForce 1080 Ti with OptiX.

Brecht Van Lommel commented

2022-06-10 15:34:18 +02:00

Added subscribers: @pmoursnv, @brecht

Brecht Van Lommel commented

2022-06-10 15:34:18 +02:00

CC @pmoursnv.

Patrick Mours commented

2022-06-27 15:09:58 +02:00

This is a driver bug that will take some time to address. AS building can currently hang when an object has all vertices zeroed out and a motion transform is applied on it (motion blur enabled).
This doesn't usually happen as an object scaled to zero still retains its vertices, just with a transform on top to scale, but with the armature it will actually apply to the vertex data (during animation in Blender, before those are retrieved by Cycles, so is difficult to work around in Cycles).

This is a driver bug that will take some time to address. AS building can currently hang when an object has all vertices zeroed out and a motion transform is applied on it (motion blur enabled). This doesn't usually happen as an object scaled to zero still retains its vertices, just with a transform on top to scale, but with the armature it will actually apply to the vertex data (during animation in Blender, before those are retrieved by Cycles, so is difficult to work around in Cycles).

Raimund Klink commented

2022-07-01 10:06:14 +02:00

Added subscriber: @Raimund58

Marcin Twarowski commented

2022-07-20 19:37:06 +02:00

Here's an example that fails with RTX 3080 ti. This one is using geometry nodes:
geometry_nodes_optix_bug.blend

Here's an example that fails with RTX 3080 ti. This one is using geometry nodes: [geometry_nodes_optix_bug.blend](https://archive.blender.org/developer/F13303827/geometry_nodes_optix_bug.blend)

Philipp Oeser removed the

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Optix fails to render an object scaled to zero with armature modifier and motion blur enabled #98497