Drivers don't read Cycles Material nodes #53991

New Issue

MWire · 2018-02-03T09:57:35+01:00

MWire commented

2018-02-03 09:57:35 +01:00

System Information
Windows 8.1, nvidia Geforce 920M

Blender Version
Broken: (2.79, 5bd8ac9)

Short description of error
Drivers don't work when the input is from the cycles material node editor

Exact steps for others to reproduce the error
Add a cycles material, create any driver that takes input from any node variable within that material.
Nodebug.blend
Attached example is attempting to control ScaleX using the variable input node.

**System Information** Windows 8.1, nvidia Geforce 920M **Blender Version** Broken: (2.79, 5bd8ac9) **Short description of error** Drivers don't work when the input is from the cycles material node editor **Exact steps for others to reproduce the error** Add a cycles material, create any driver that takes input from any node variable within that material. [Nodebug.blend](https://archive.blender.org/developer/F2102037/Nodebug.blend) Attached example is attempting to control ScaleX using the variable input node.

MWire commented

2018-02-03 09:57:35 +01:00

Added subscriber: @MWire

Sergey Sharybin commented

2018-02-05 14:44:24 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2018-02-05 14:44:24 +01:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2018-02-05 14:44:24 +01:00

Sergey Sharybin self-assigned this 2018-02-05 14:44:24 +01:00

Sergey Sharybin commented

2018-02-05 14:44:24 +01:00

Material owns it's node tree, and the only "standalone" node trees you will see will come from node groups. So for your case you need to read from material datablock, using it's node_tree in RNA path.

Thanks for the report, but don't see bug here.

Material owns it's node tree, and the only "standalone" node trees you will see will come from node groups. So for your case you need to read from material datablock, using it's `node_tree` in RNA path. Thanks for the report, but don't see bug here.

MWire commented

2018-02-05 16:34:16 +01:00

It seems like it is another bug, Blender doesn't save the path I specified here using "Add driver from target"

It seems like it is another bug, Blender doesn't save the path I specified here using "Add driver from target" ![Image 308.png](https://archive.blender.org/developer/F2131623/Image_308.png)

Sergey Sharybin commented

2018-02-05 16:40:02 +01:00

if that's another bug make a new report, with all the steps and demo file needed to reproduce it.

MWire commented

2018-02-05 16:42:10 +01:00

Alright, but what is the full correct RNA path that I should use to make the "Driver source" directly control "ScaleX"?

Sergey Sharybin commented

2018-02-05 16:51:32 +01:00

Here is a file for you: Nodebug_working.blend

Some notes:

This setup only works with new dependency graph.
It is possible that we are still missing some depsgraph updates on changes, so if something doesn't work for you, try saving and reload file and see if that fixes the issue. If that solves the issue, make a report about depsgraph missing updates.

Here is a file for you: [Nodebug_working.blend](https://archive.blender.org/developer/F2131742/Nodebug_working.blend) Some notes: - This setup only works with new dependency graph. - It is possible that we are still missing some depsgraph updates on changes, so if something doesn't work for you, try saving and reload file and see if that fixes the issue. If that solves the issue, make a report about depsgraph missing updates.

MWire commented

2018-02-05 17:15:29 +01:00

Looks like that's the issue. Alright, I'll make a report then. Thanks.

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Drivers don't read Cycles Material nodes #53991