Invalid geometry in Alembic crashes Blender #76514

New Issue

Radu Mitroi · 2020-05-07T19:07:03+02:00

Radu Mitroi commented

2020-05-07 19:07:03 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1660/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: 77d23b0bd7
Worked: 2.79

Short description of error
I'm trying to import an alembic file from SpeedTree that contains a plant with a growing animation. As soon as I hit Import, Blender crashes.
Note: If I try to import an alembic file of the same model, only with wind animation and no growing animation, the file imports fine and the animation works. Tried opening the growing animation file in Blender 2.79 as well, and it all works perfectly fine.
I tried cheating my way around, and save that scene in Blender 2.79 and then open it in Blender 2.82. While that works, I can open the scene and the model is in there, moving the timeline in any way causes Blender to crash again.

Exact steps for others to reproduce the error
Just open an empty scene and try to import the attached files. One of them will crash your Blender.

Flowe_wind.abc

Flower_grow.abc

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 1660/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92 **Blender Version** Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: `77d23b0bd7` Worked: 2.79 **Short description of error** I'm trying to import an alembic file from SpeedTree that contains a plant with a growing animation. As soon as I hit Import, Blender crashes. Note: If I try to import an alembic file of the same model, only with wind animation and no growing animation, the file imports fine and the animation works. Tried opening the growing animation file in Blender 2.79 as well, and it all works perfectly fine. I tried cheating my way around, and save that scene in Blender 2.79 and then open it in Blender 2.82. While that works, I can open the scene and the model is in there, moving the timeline in any way causes Blender to crash again. **Exact steps for others to reproduce the error** Just open an empty scene and try to import the attached files. One of them will crash your Blender. [Flowe_wind.abc](https://archive.blender.org/developer/F8518664/Flowe_wind.abc) [Flower_grow.abc](https://archive.blender.org/developer/F8518666/Flower_grow.abc)

Radu Mitroi commented

2020-05-07 19:07:03 +02:00

Added subscriber: @radumitroi

Philipp Oeser commented

2020-05-07 19:45:02 +02:00

Added subscribers: @dr.sybren, @lichtwerk

Philipp Oeser commented

2020-05-07 19:45:02 +02:00

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

Philipp Oeser commented

2020-05-07 19:45:02 +02:00

Works fine in 2.80 release still, later releases fail...

CC @sybren.

Works fine in 2.80 release still, later releases fail... CC @sybren.

Radu Mitroi commented

2020-05-07 19:49:37 +02:00

In #76514#926275, @lichtwerk wrote:
Works fine in 2.80 release still, later releases fail...

CC @sybren.

Well, I'll have a go on with 2.80. Hopefully it does work. I only need it in a version that supports Eevee, so I don't care for the rest if it does work.

> In #76514#926275, @lichtwerk wrote: > Works fine in 2.80 release still, later releases fail... > > CC @sybren. Well, I'll have a go on with 2.80. Hopefully it does work. I only need it in a version that supports Eevee, so I don't care for the rest if it does work.

Sybren A. Stüvel was assigned by Bastien Montagne

2020-05-12 09:56:15 +02:00

Sybren A. Stüvel changed title from ~~Blender opens some alembic files while others cause immediate crash~~ to Invalid geometry in Alembic crashes Blender

2020-05-12 13:14:59 +02:00

blender-admin commented

2020-05-12 13:21:17 +02:00

This issue was referenced by 973ab436f0

This issue was referenced by 973ab436f07c652cb6aa13bedc351df06bce6561

Sybren A. Stüvel commented

2020-05-12 13:43:48 +02:00

SpeedTree is known for producing invalid geometry, and this case is the same. Still, it's nice to not have Blender crash on it.

Sybren A. Stüvel commented

2020-05-12 13:59:12 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Sybren A. Stüvel closed this issue

2020-05-12 13:59:12 +02:00

Thomas Dinges added this to the 2.83 LTS milestone 2023-02-08 16:35:48 +01:00

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Invalid geometry in Alembic crashes Blender #76514