depsgraph.view_layer.name driver expression doesn't work correctly #106586

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opened 2023-04-05 12:01:42 +02:00 by Christoph Werner · 9 comments

Christoph Werner commented

2023-04-05 12:01:42 +02:00

System Information
Operating system: Windows 11
Graphics card: Geforce RTX 3090

Blender Version
Broken: 3.3.5 LTS
Broken: 3.5

Short description of error
I use a driver expression to control modifiers visibility or shader values depending on a view layer name. If the needed view layer is active, then values change. All works well when switching viewlayers manually inside the viewport of my scene. But as soon as I render the scene, the expression is ignored and nothing happen.

Exact steps for others to reproduce the error

Open attached file
Change view layer few times

Driver will change only once. This also doesn't work when rendering.

**System Information** Operating system: Windows 11 Graphics card: Geforce RTX 3090 **Blender Version** Broken: 3.3.5 LTS Broken: 3.5 **Short description of error** I use a driver expression to control modifiers visibility or shader values depending on a view layer name. If the needed view layer is active, then values change. All works well when switching viewlayers manually inside the viewport of my scene. But as soon as I render the scene, the expression is ignored and nothing happen. **Exact steps for others to reproduce the error** * Open attached file * Change view layer few times Driver will change only once. This also doesn't work when rendering. ![image](/attachments/2ad109de-b39d-47df-968b-255816c826e4)

106586.blend

852 KiB

616 KiB

Christoph Werner added the

labels 2023-04-05 12:01:43 +02:00

Iliya Katushenock added the

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labels 2023-04-05 15:24:34 +02:00

Iliya Katushenock commented

2023-04-05 15:27:03 +02:00

Member

Read prefs: "C:\Users\rfnei\AppData\Roaming\Blender Foundation\Blender\3.6\config\userpref.blend"
Read blend: "C:\Users\rfnei\Downloads\invertedhull_outlines.blend"
        BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support

Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0
For target: (type=Object, name="Suzanne", property=show_render, property_index=-1)

        BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support

Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0
For target: (type=Object, name="Suzanne.001", property=show_viewport, property_index=-1)

        BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support

Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0
For target: (type=Object, name="Suzanne", property=show_viewport, property_index=-1)

        BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support

Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0
For target: (type=Object, name="Suzanne.001", property=show_render, property_index=-1)

WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_viewport[0]
        BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support
WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_render[0]

Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1
For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1)

Read blend: "C:\Users\rfnei\Downloads\invertedhull_outlines.blend"
WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_viewport[0]
WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_render[0]

Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1
For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1)

Traceback (most recent call last):
  File "<bpy driver>", line 1, in <module>
NameError: name 'view_layer' is not defined

``` Read prefs: "C:\Users\rfnei\AppData\Roaming\Blender Foundation\Blender\3.6\config\userpref.blend" Read blend: "C:\Users\rfnei\Downloads\invertedhull_outlines.blend" BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0 For target: (type=Object, name="Suzanne", property=show_render, property_index=-1) BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0 For target: (type=Object, name="Suzanne.001", property=show_viewport, property_index=-1) BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0 For target: (type=Object, name="Suzanne", property=show_viewport, property_index=-1) BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support Error in PyDriver: expression failed: 1 if depsgraph.view_layer.name == 'lines_invertedhull' else 0 For target: (type=Object, name="Suzanne.001", property=show_render, property_index=-1) WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_viewport[0] BPY_driver_exec: restricted access disallows name 'view_layer', enable auto-execution to support WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_render[0] Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1 For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1) Read blend: "C:\Users\rfnei\Downloads\invertedhull_outlines.blend" WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_viewport[0] WARN (bke.anim_sys): C:\Users\blender\git\blender-vdev\blender.git\source\blender\blenkernel\intern\anim_sys.c:4192 BKE_animsys_eval_driver: invalid driver - modifiers["Solidify"].show_render[0] Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1 For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1) Traceback (most recent call last): File "<bpy driver>", line 1, in <module> NameError: name 'view_layer' is not defined ```

Richard Antalik commented

2023-04-13 06:28:05 +02:00

Member

I applied such driver to scale and it doesn't work here. I wasn't aware, that depsgraph variable could be accessed in such way. Can you provide working .blend file?

I applied such driver to scale and it doesn't work here. I wasn't aware, that `depsgraph` variable could be accessed in such way. Can you provide working .blend file?

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labels 2023-04-13 06:28:15 +02:00

Christoph Werner commented

2023-04-13 08:56:25 +02:00

Author

I applied such driver to scale and it doesn't work here. I wasn't aware, that depsgraph variable could be accessed in such way. Can you provide working .blend file?

An example file is provided in my first post.

> I applied such driver to scale and it doesn't work here. I wasn't aware, that `depsgraph` variable could be accessed in such way. Can you provide working .blend file? An example file is provided in my first post.

Richard Antalik commented

2023-04-14 11:04:39 +02:00

Member

Ah sorry, I have missed it. But Even with provided file driver value does not change here.

Also it says as mentioned above:

Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1
For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1)

Traceback (most recent call last):
  File "<bpy driver>", line 1, in <module>
NameError: name 'view_layer' is not defined

Are you sure that this drivers actually works in viewport?

Ah sorry, I have missed it. But Even with provided file driver value does not change here. Also it says as mentioned above: ``` Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1 For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1) Traceback (most recent call last): File "<bpy driver>", line 1, in <module> NameError: name 'view_layer' is not defined ``` Are you sure that this drivers actually works in viewport?

Richard Antalik commented

2023-04-14 11:09:04 +02:00

Member

... I have noticed, that in provided file it was missing depsgraph in expression. With that it works in a way, that it changes value to 0, but never to 1, which is inconsistent behavior at least. So I guess I can confirm this issue.

... I have noticed, that in provided file it was missing `depsgraph` in expression. With that it works in a way, that it changes value to 0, but never to 1, which is inconsistent behavior at least. So I guess I can confirm this issue.

Christoph Werner commented

2023-04-14 11:12:31 +02:00

Author

Are you sure that this drivers actually works in viewport?

Yes they do. If you change the viewports in my example scene, the modifiers change also. Switch to "lines_invertedhull" viewlayer and you'll see the modifiers for the outlines are active.

> Are you sure that this drivers actually works in viewport? Yes they do. If you change the viewports in my example scene, the modifiers change also. Switch to "lines_invertedhull" viewlayer and you'll see the modifiers for the outlines are active. ![image](/attachments/0918be53-9ccf-4428-aadd-d138f7c816a3)

726 KiB

Christoph Werner commented

2023-04-14 11:12:59 +02:00

Author

Ah sorry, I have missed it. But Even with provided file driver value does not change here.

Also it says as mentioned above:
Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1
For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1)

Traceback (most recent call last):
  File "<bpy driver>", line 1, in <module>
NameError: name 'view_layer' is not defined
Are you sure that this drivers actually works in viewport?

> Ah sorry, I have missed it. But Even with provided file driver value does not change here. > > Also it says as mentioned above: > ``` > Error in PyDriver: expression failed: 0 if view_layer.name == 'lines_invertedhull' else 1 > For target: (type=NodeTree, name="Shader Nodetree", property=default_value, property_index=-1) > > Traceback (most recent call last): > File "<bpy driver>", line 1, in <module> > NameError: name 'view_layer' is not defined > ``` > > Are you sure that this drivers actually works in viewport?

Christoph Werner closed this issue

2023-04-14 11:13:01 +02:00

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labels 2023-04-14 11:13:03 +02:00

Christoph Werner reopened this issue

2023-04-14 11:13:14 +02:00

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labels 2023-04-14 11:13:16 +02:00

Christoph Werner commented

2023-04-14 11:17:51 +02:00

Author

Small info to the Blender Developers: I clicked on "Close issue" button for accident, because both buttons are placed close side by side. The issue was immediately closed. This is not a good behavior.

Please add a security question window before closing an issue. I know this takes some more time, but avoids unintentionally issue closing!

Small info to the **Blender Developers**: I clicked on "Close issue" button for accident, because both buttons are placed close side by side. The issue was immediately closed. This is not a good behavior. Please add a security question window before closing an issue. I know this takes some more time, but avoids unintentionally issue closing!

Richard Antalik changed title from ~~depsgraph.view_layer.name driver expression doesn't work in renders~~ to depsgraph.view_layer.name driver expression doesn't work correctly

2023-04-14 12:00:07 +02:00

Richard Antalik added

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labels 2023-04-14 12:00:57 +02:00

Richard Antalik commented

2023-04-14 12:07:21 +02:00

Member

We do check updates on all reports, so chances of closing something accidentally are very slim. But I agree that the button is annoyingly close to comment button.

We do check updates on all reports, so chances of closing something accidentally are very slim. But I agree that the button is annoyingly close to comment button.

Df referenced this issue

2023-05-05 18:47:38 +02:00

Drivers on view layer property fails when view layer is not active, and remains broken when layer becomes active again #107663

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