Fake dependency cycle when one modifier drives another #104318

New Issue

Demeter Dzadik · 2023-02-03T12:06:23+01:00

Demeter Dzadik commented

2023-02-03 12:06:23 +01:00

System Information
Operating system: Linux-6.1.9-gentoo-x86_64-Intel-R-_Core-TM-i9-9900K_CPU@_3.60GHz-with-glibc2.36 64 Bits
Graphics card: NVIDIA GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 525.85.05

Blender Version
Broken: version: 3.5.0 Alpha, branch: HEAD (modified), commit date: 2023-02-01 18:29, hash: 9b86741ae7

Short description of error
If one modifier's visibility drives another, it results in a dependency cycle in the console.
This doesn't feel intended or logical to me. And the file seems to function without any issues or one-frame-delay.

Exact steps for others to reproduce the error

File: modifier_fake_dep_cycle.blend
Insert a keyframe on any property of the cube
Console warns about dep cycle

**System Information** Operating system: Linux-6.1.9-gentoo-x86_64-Intel-R-_Core-TM-_i9-9900K_CPU_@_3.60GHz-with-glibc2.36 64 Bits Graphics card: NVIDIA GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 525.85.05 **Blender Version** Broken: version: 3.5.0 Alpha, branch: HEAD (modified), commit date: 2023-02-01 18:29, hash: `9b86741ae7` **Short description of error** If one modifier's visibility drives another, it results in a dependency cycle in the console. This doesn't feel intended or logical to me. And the file seems to function without any issues or one-frame-delay. **Exact steps for others to reproduce the error** - File: [modifier_fake_dep_cycle.blend](https://archive.blender.org/developer/F14235989/modifier_fake_dep_cycle.blend) - Insert a keyframe on any property of the cube - Console warns about dep cycle

Demeter Dzadik commented

2023-02-03 12:06:23 +01:00

Added subscriber: @Mets

Iliya Katushenock commented

2023-02-03 16:45:06 +01:00

Added subscriber: @mod_moder

Iliya Katushenock commented

2023-02-03 16:45:06 +01:00

It my first time, when i try to find bug in dependency graph, so sorry if im wrong.
As i can see, object visibility depend on object location (for make possible skip render of object, what you can't see on screen)
But your driver depend on visibility flag in drivers, that depend on object visibility flag (Object.visibility - you setting in outliner affected on drivers flags)
{F14237060, size=full}

It my first time, when i try to find bug in dependency graph, so sorry if im wrong. As i can see, object visibility depend on object location (for make possible skip render of object, what you can't see on screen) But your driver depend on visibility flag in drivers, that depend on object visibility flag (Object.visibility - you setting in outliner affected on drivers flags) {[F14237060](https://archive.blender.org/developer/F14237060/image.png), size=full}

Germano Cavalcante commented

2023-02-03 21:51:58 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2023-02-03 21:51:58 +01:00

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

Germano Cavalcante commented

2023-02-03 21:51:58 +01:00

This seems to be too complex for the #triaging team to confirm if it really is a fake dependency cycle and therefore a bug.
But at first glance it seems so, so I'm confirming it.

The classification is for the #animation_rigging team.

This seems to be too complex for the #triaging team to confirm if it really is a fake dependency cycle and therefore a bug. But at first glance it seems so, so I'm confirming it. The classification is for the #animation_rigging team.

Philipp Oeser removed the

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Fake dependency cycle when one modifier drives another #104318