Geometry node/shader texture race condition? #102171

New Issue

PBnFlash · 2022-10-30T19:56:10+01:00

PBnFlash commented

2022-10-30 19:56:10 +01:00

System Information
Operating system: Linux mint 20.3
Graphics card: 3090
CPU: AMD Ryzen 5 2600

Blender Version
Broken: 3.3.1

Short description of error
Using the same image texture sequence texture in both geometry nodes and shader is producing unexpected and inconsistent results.

Exact steps for others to reproduce the error
A geo-nodes setup that uses the alpha channel from a texture with the frame driven by a driver linked to the shader image sequence texture will only preform the geonodes operation on part of the image texture. Moving the frame forward and back will load the texture properly. However during a render with "persistent data" turned off/on many frames will have this kind of error.
(this should have all faces where the texture alpha > 0 remaining)

Go forward and back to reload textures on this frame

Load a longer than buffer length image sequence with alpha channel into this file for geonodes and shader, this may be a side effect of my lopsided system. Geo Nodes execution is still less than 100 ms on my system. I suspect the geonodes starts execution then the shader interrupts somehow.
GeoNodesShaderRace.blend

**System Information** Operating system: Linux mint 20.3 Graphics card: 3090 CPU: AMD Ryzen 5 2600 **Blender Version** Broken: 3.3.1 **Short description of error** Using the same image texture sequence texture in both geometry nodes and shader is producing unexpected and inconsistent results. **Exact steps for others to reproduce the error** A geo-nodes setup that uses the alpha channel from a texture with the frame driven by a driver linked to the shader image sequence texture will only preform the geonodes operation on part of the image texture. Moving the frame forward and back will load the texture properly. However during a render with "persistent data" turned off/on many frames will have this kind of error. (this should have all faces where the texture alpha > 0 remaining) ![image.png](https://archive.blender.org/developer/F13811632/image.png) Go forward and back to reload textures on this frame ![image.png](https://archive.blender.org/developer/F13811653/image.png) Load a longer than buffer length image sequence with alpha channel into this file for geonodes and shader, this may be a side effect of my lopsided system. Geo Nodes execution is still less than 100 ms on my system. I _suspect_ the geonodes starts execution then the shader interrupts somehow. [GeoNodesShaderRace.blend](https://archive.blender.org/developer/F13811290/GeoNodesShaderRace.blend)

PBnFlash commented

2022-10-30 19:56:10 +01:00

Added subscriber: @PBn

Iliya Katushenock commented

2022-10-30 20:07:42 +01:00

Added subscriber: @mod_moder

Iliya Katushenock commented

2022-10-30 20:07:42 +01:00

Please simplify your file. This file is too complicated to find a bug.

Edward commented

2022-10-30 20:17:17 +01:00

Added subscriber: @edward88

Edward commented

2022-10-30 20:17:17 +01:00

Can you provide the image sequence please?

PBnFlash commented

2022-10-30 20:30:22 +01:00

In #102171#1439007, @mod_moder wrote:
Please simplify your file. This file is too complicated to find a bug.

I will try I am having a hard time reproducing it with another node-setup.

In #102171#1439009, @edward88 wrote:
Can you provide the image sequence please?

The majority of the image sequences in the project are .exr dwaa, but a few early shots were png, I didn't see a reason to replace them but the png sequences seem more likely to do it.
frames.zip
Please point the shader and geonodes textures to this sequence.

> In #102171#1439007, @mod_moder wrote: > Please simplify your file. This file is too complicated to find a bug. I will try I am having a hard time reproducing it with another node-setup. > In #102171#1439009, @edward88 wrote: > Can you provide the image sequence please? The majority of the image sequences in the project are .exr dwaa, but a few early shots were png, I didn't see a reason to replace them but the png sequences _seem_ more likely to do it. [frames.zip](https://archive.blender.org/developer/F13811939/frames.zip) Please point the shader and geonodes textures to this sequence.

Omar Emara commented

2022-11-07 10:27:15 +01:00

Added subscriber: @OmarEmaraDev

Omar Emara commented

2022-11-07 10:27:15 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Omar Emara commented

2022-11-07 10:27:15 +01:00

I can't replicate the issue myself. Is having the driver significant to reproduce the issue? I mean, does removing it and setting the start frame to 1 manually fix the issue?

PBnFlash commented

2022-11-21 19:10:00 +01:00

I tried rendering again with the ranges in my project manually set.
I am still experiencing the issue.
It seems less common but it's hard to judge.
I will try to produce a node tree that has the glitch more consistently this weekend.

I tried rendering again with the ranges in my project manually set. I am still experiencing the issue. It *seems* less common but it's hard to judge. I will try to produce a node tree that has the glitch more consistently this weekend.

Iliya Katushenock commented

2022-11-21 19:13:58 +01:00

This will help a lot

PBnFlash commented

2022-12-04 05:01:34 +01:00

I really can't get it to replicate. Even shots that have it almost every other frame in my scene files will stop doing it entirely when isolated to another file w/o backgrounds or with timings shifted.

I really can't manage to replicate it in a portable, consistent way.

My apologies.

I really can't get it to replicate. Even shots that have it almost every other frame in my scene files will stop doing it entirely when isolated to another file w/o backgrounds or with timings shifted. I really can't manage to replicate it in a portable, consistent way. My apologies.

Iliya Katushenock commented

2022-12-04 09:36:50 +01:00

If there is no more bug, it can be closed

Thomas Dinges commented

2022-12-15 16:32:51 +01:00

Changed status from 'Needs User Info' to: 'Archived'

Thomas Dinges closed this issue

2022-12-15 16:32:51 +01:00

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Geometry node/shader texture race condition? #102171