Panning with NDOF device in Shader Editor changes colors in RGB node #105224
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Reference: blender/blender#105224
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System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 527.56
NDOF Device: 3Dconnexion SpaceMouse Compact
Blender Version
Broken: version: 3.4.1, branch: blender-v3.4-release, commit date: 2022-12-20 08:50, hash:
rBef9ca44dee7fWorked: Never worked as expected, tested other versions
Short description of error
When there is an RGB node in Shader Editor, panning in the editor window with NDOF device and stumbling upon the Color/Value areas inside the RGB node with mouse cursor leads to changing the colors in the node. A the same time Undo History fills with many steps called "Unknown Action".
Same thing happens with Color node in Geometry Nodes editor window and RGB node in Compositor editor window.
I've tried Blender version 2.93.15 (hash:
a7633d6b57da) and version: 2.82 (sub 7) (hash:rB77d23b0bd76f), but the results are the same. I searched everywhere in the settings, but I couldn't find a way to disable this behavior.This looks like a bug, not like a feature, because you can do this by accident when you really don't want this to happen. And you can accidentally change the color of some important RGB node without noticing it, which will lead to unwanted changes in your file.
Please watch the attached videos:
RGB node in Shader Editor
Color node in Geometry Node Editor
Please check the Blender file if you have NDOF device:
Blender_3.4.1_ef9ca44dee7f_BugReport_NDOF_RGB_Node.blend
Exact steps for others to reproduce the error
Please use default settings of Blender and NDOF device.
Panning with NDOF device inside Shader Editorto Panning with NDOF device in Shader Editor changes colors in RGB nodeI don't know if there is a hero who can check this report
Do you mean there are very few NDOF devices users, so the priority of this bug is going to be very low?
More likely
Although hope should not be lost
I see...
Well, I have hope! :D
I am not familiar with a 3Dconnexion Space Mouse.
If it really is a bug it's strange that it hasn't been reported before.
If I'm not mistaken, some developers that have a 3Dconnexion Space Mouse are:
@ideasman42, @HooglyBoogly and @Sergey
Could you guys confirm if it's a bug?
This feature becomes a bug only if you are panning inside the Shader Editor, Geometry Nodes and Compositor windows and stumble upon RGB or Color node. But if you open the color value in some node as a popup and use this feature on purpose, it's quite useful and handy. Please watch the attached video.
And in that case on the video changing colors doesn't mess up the Undo History. Every color change records there as single Undo action, as long as you didn't close the color selection popup. Instead of these Unknown Actions:
you get clean Undo History like this:
So the solution can be preventing color changing when you are panning the editors.
The NDOF device controlling color wheels is indeed something that happens here, but to me it seems more like a feature than a bug.
In the 3.6 the Undo history shows "value used for unconnected socket" or something between those lines. So worth checking this aspect in a newer Blender builds.
I've just tested it with Blender 3.6, and both problems still persist:
I used version: 3.6.0 Alpha, branch: main, commit date: 2023-03-03 00:42, hash:
37c0b0b2b890Please see the attached video.
Ah, there is a difference in the behavior of color sockets and color wheel without corresponding socket.
Indeed panning through RGB node which will all of a sudden modify the value is quite bad. And this is somrthing I can confirm here.
For the history entries: those are not dependent on the NDOF. If you use mouse to change the value it will create the same "Unknown Action" as NDOF. So this is more generic problem.
I agree! Can it be fixed?
The possible solution can be detecting the location of the mouse cursor at the moment when user starts using the NDOF device inside the Editor. If the cursor sits on these areas marked with red rectangles:
then the process of changing color in the node should begin. But if the cursor sits in any other place in the Editor, then the panning inside the Editor should begin instead, and if the cursor stumbles upon RGB or Color node in that case, Blender should ignore the color changing feature and the panning should continue instead.
What do you think about this solution? Is it possible to be implemented?
I didn't know about that.
Thank you!
I can confirm, changing colors with mouse cursor creates the same "Unknown Action" in Undo History too, but it creates just one step in History. And changing colors with NDOF device always creates almost two hundred of them instantly! Please see the attached video. First time I changed colors with mouse cursor, and second time with NDOF device.
EDIT: I'm sorry, I have accidentally closed the issue. Reopened it again.
Will mark this as confirmed.
Thank you very much, Pratik! 🙏