Overrides fail in combination with materials / driven parameters #87997

New Issue

Steffen Dünner · 2021-05-02T22:47:08+02:00

Steffen Dünner commented

2021-05-02 22:47:08 +02:00

System Information
Operating system: Linux-5.8.0-50-generic-x86_64-with-glibc2.31 64 Bits
Graphics card: NVIDIA GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 465.19.01

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-05-02 13:56, hash: d8fdb06a81
Worked: (newest version of Blender that worked as expected)

Short description of error
When trying to control the parameters of a material of a linked object with drivers, there are no updates, i.e. it doesn't work.
It doesn't matter if the source of the driver is an empty, a bone or a custom property (or whatnot).

Exact steps for others to reproduce the error

Download the two attached blend files
Open the "Material_Rig_v01.blend". (It contains a linked and overridden collection from the "LIB_Material_Rig_v01.blend". Basically it's a cube with a Principled Shader on which the "Emission Strength" is controlled by the X-position of the bone of an Armature).
Click start render preview, (e.g. by pressing Z + up in the viewport)
Select the single bone (in pose mode) and slide it to the right (its movement is constrained so you can't break anything)
Nothing changes, the cube stays grey (bug)
Now open the source of the linked "rig", namely "LIB_Material_Rig_v01.blend"
Start preview rendering again and move the bone
It works as expected -> the bone's x-position drives the "Emission Strength" as expected and the cube starts to get brighter

I already tried using custom properties or empties as a replacement for a bone. Same result.

LIB_Material_Rig_v01.blend
Material_Rig_v01.blend

**System Information** Operating system: Linux-5.8.0-50-generic-x86_64-with-glibc2.31 64 Bits Graphics card: NVIDIA GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 465.19.01 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-05-02 13:56, hash: `d8fdb06a81` Worked: (newest version of Blender that worked as expected) **Short description of error** When trying to control the parameters of a material of a linked object with drivers, there are no updates, i.e. it doesn't work. It doesn't matter if the source of the driver is an empty, a bone or a custom property (or whatnot). **Exact steps for others to reproduce the error** - Download the two attached blend files - Open the "Material_Rig_v01.blend". (It contains a linked and overridden collection from the "LIB_Material_Rig_v01.blend". Basically it's a cube with a Principled Shader on which the "Emission Strength" is controlled by the X-position of the bone of an Armature). - Click start render preview, (e.g. by pressing Z + up in the viewport) - Select the single bone (in pose mode) and slide it to the right (its movement is constrained so you can't break anything) Nothing changes, the cube stays grey (bug) - Now open the source of the linked "rig", namely "LIB_Material_Rig_v01.blend" - Start preview rendering again and move the bone It works as expected -> the bone's x-position drives the "Emission Strength" as expected and the cube starts to get brighter I already tried using custom properties or empties as a replacement for a bone. Same result. [LIB_Material_Rig_v01.blend](https://archive.blender.org/developer/F10050229/LIB_Material_Rig_v01.blend) [Material_Rig_v01.blend](https://archive.blender.org/developer/F10050222/Material_Rig_v01.blend)

Steffen Dünner commented

2021-05-02 22:47:08 +02:00

Added subscriber: @SteffenD

Steffen Dünner commented

2021-05-03 12:43:23 +02:00

Quick update: If I link the collection to a scene and use "Make Proxy" instead of "Make Library Override" everything works as expected...

Steffen Dünner commented

2021-05-03 13:58:12 +02:00

OK, this seems to be "fixed" with this commit: https://developer.blender.org/rB6899dbef77cd26df3588888040887e4e41c1ec43

Germano Cavalcante commented

2021-05-04 21:39:53 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-05-04 21:39:53 +02:00

This appears to be a duplicate of the #82404 (Library Overrides: Shader drivers stop working after save and reload).
The difference is that here instead of changing a property through the UI, the property is the position of the bone.

This appears to be a duplicate of the #82404 (Library Overrides: Shader drivers stop working after save and reload). The difference is that here instead of changing a property through the UI, the property is the position of the bone.

Philipp Oeser commented

2021-05-12 16:48:06 +02:00

Added subscriber: @lichtwerk