GeoNodes bake is lost after closing + reopening (or crash + reopen) #121140

New Issue

Mark Cowan · 2024-04-26T18:41:40+02:00

Mark Cowan commented

2024-04-26 18:41:40 +02:00

System Information
Operating system: Linux-6.5.0-28-generic-x86_64-with-glibc2.35 64 Bits, X11 UI
Graphics card: Mesa Intel(R) Graphics (RPL-P) Intel 4.6 (Core Profile) Mesa 23.2.1-1ubuntu3.1~22.04.2

Blender Version
Broken: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: e1743a0317bc
Worked: (newest version of Blender that worked as expected)

Short description of error
I use a Bake node in GeoNodes to bake an animation, then I close blender.
I reopen Blender and the baked geometry does not appear for the object - in fact no geometry is shown at all.

I think this issue started recently in the project rather than occuring the whole time, although I'm not certain.

I have a suspicion as to when this issue may have started, although I'm not certain:

Since GeoNodes can't emit vertex weights that Armature modifier will use, I tried to split the generation of instancing points from the instancing itself. This was so that the armature modifier (bone envelope binding) would affect position/orientation of entire instances at a time rather than parts of them.
So I had: GeoNodes to generate the points with their attributes → Armature modifier → GeoNodes to instance on points and realize instances.
This approach didn't work, I think the instancing was using the positions from the first GeoNodes, not from the Armature modifier.
I reverted back to my previous approach of just having GeoNodes (with instancing and realize) → Armature modifier.

I have another issue with this file, related to the Sun Position addon - I created a ticket for that here. Possibly the two are related, but I don't think so from the stack trace.

Exact steps for others to reproduce the error
[a quicker/easier more minimal example is provided in the comment following this one]

(to speed things up, set the frame range from e.g. 1 to 40 instead of to 4000)

Open the blend file.
Open the Geo Nodes tab.
Select the "Leaves" object.
Select the GeoNodes modifier on it.
Find the "Bake" node.
Bake (as animation).
Change frame (e.g. Alt+MouseWheel, or jump in dope sheet) to see that the animation is baked.
File -> Save / Ctrl+S
Close Blender.

Open the blend file again.
There's no geometry output by the Geonodes modifier at all. [issue reproduced at this point]
Click the bin on the Bake node to delete the bake - now geometry appears, but the animation is incomplete when jumping across the timeline, as expected without a full bake.

**System Information** Operating system: Linux-6.5.0-28-generic-x86_64-with-glibc2.35 64 Bits, X11 UI Graphics card: Mesa Intel(R) Graphics (RPL-P) Intel 4.6 (Core Profile) Mesa 23.2.1-1ubuntu3.1~22.04.2 **Blender Version** Broken: version: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: `e1743a0317bc` Worked: (newest version of Blender that worked as expected) **Short description of error** I use a Bake node in GeoNodes to bake an animation, then I close blender. I reopen Blender and the baked geometry does not appear for the object - in fact no geometry is shown at all. I _think_ this issue started recently in the project rather than occuring the whole time, although I'm not certain. I have a suspicion as to when this issue may have started, although I'm not certain: - Since GeoNodes can't emit vertex weights that Armature modifier will use, I tried to split the generation of instancing points from the instancing itself. This was so that the armature modifier (bone envelope binding) would affect position/orientation of entire instances at a time rather than parts of them. - So I had: GeoNodes to generate the points with their attributes → Armature modifier → GeoNodes to instance on points and realize instances. - This approach didn't work, I think the instancing was using the positions from the first GeoNodes, not from the Armature modifier. - I reverted back to my previous approach of just having GeoNodes (with instancing and realize) → Armature modifier. I have another issue with this file, related to the Sun Position addon - I created a ticket for that [here](https://projects.blender.org/blender/blender-addons/issues/105295). Possibly the two are related, but I don't think so from the stack trace. **Exact steps for others to reproduce the error** [a quicker/easier more minimal example is provided in the comment following this one] (to speed things up, set the frame range from e.g. 1 to 40 instead of to 4000) 1. Open the blend file. 2. Open the Geo Nodes tab. 3. Select the "Leaves" object. 4. Select the GeoNodes modifier on it. 5. Find the "Bake" node. 6. Bake (as animation). 7. Change frame (e.g. Alt+MouseWheel, or jump in dope sheet) to see that the animation is baked. 8. File -> Save / Ctrl+S 9. Close Blender. Open the blend file again. There's no geometry output by the Geonodes modifier at all. [issue reproduced at this point] Click the bin on the Bake node to delete the bake - now geometry appears, but the animation is incomplete when jumping across the timeline, as expected without a full bake.

untitled.blend

5.6 MiB

system-info.txt

20 KiB

sun-issue.zip

1.3 MiB

Mark Cowan added the

labels 2024-04-26 18:41:41 +02:00

Mark Cowan commented

2024-04-26 23:36:52 +02:00

Here's a more minimal example:

Open blend file
Select first geonodes modifier of the "cube"
In geonode graph, Bake (as animation)
Jump around timeline to confirm we have a baked animation available
Close blender
Open blend file again
Jump around timeline and notice that we have no geometry emitted at all for the "cube"
Delete the bake (bin button in geonodes graph)
Geometry appears, and can be re-baked.

I've also had issues recently that may be caused by "Sun Position" addon, for which I filed a separate ticket.
This minimal example demonstrates the same issue regardless of whether that addon is enabled or not.

Here's a more minimal example: 1. Open blend file 2. Select first geonodes modifier of the "cube" 3. In geonode graph, Bake (as animation) 4. Jump around timeline to confirm we have a baked animation available 5. Close blender 6. Open blend file again 7. Jump around timeline and notice that we have no geometry emitted at all for the "cube" 8. Delete the bake (bin button in geonodes graph) 9. Geometry appears, and can be re-baked. I've also had issues recently that may be caused by "Sun Position" addon, for which I filed a separate ticket. This minimal example demonstrates the same issue regardless of whether that addon is enabled or not.

system-info.txt

20 KiB

bake-lost-when-reopening.blend

1.1 MiB

👀 1

Mark Cowan commented

2024-04-27 09:55:06 +02:00

Please let me know if there's anything more I can provide to help with diagnosing / fixing this.

I'm a software engineer. I have no familiarity with the Blender codebase yet, but this is probably a nice time to change that since I want to build some audio-related addons whenever I next have a large amount of time to spare.

Please let me know if there's anything more I can provide to help with diagnosing / fixing this. I'm a software engineer. I have no familiarity with the Blender codebase yet, but this is probably a nice time to change that since I want to build some audio-related addons whenever I next have a large amount of time to spare.

Iliya Katushenock added

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

GeoNodes bake is lost after closing + reopening (or crash + reopen) #121140