Page MenuHome

Fade Geometry state changes selectability
Confirmed, NormalPublicBUG


System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1060 3GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.86

Blender Version
Broken: version: 2.83 (sub 10), branch: master, commit date: 2020-03-19 11:11, hash: rBcc516b82ef68

Short description of error
With Fade Geometry enabled, other objects can not be selected while in pose mode.
With Fade Geometry disabled, other objects can be selected while in pose mode.

Exact steps for others to reproduce the error

  1. Open file
  2. Try clicking on bone and cube - selected item and interaction mode should be changed
  3. With the bone selected and in pose mode: in Viewport Overlays, check Fade Geometry
  4. Repeat step 2 - once in pose mode, cube can not be selected

Event Timeline

Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 80.Oct 18 2019, 10:26 AM

I have to agree this confuses me as well:

First off, I looks like if we are in this "mixed-selection-scenario" (armature in pose, mesh in weightpaint), we are "abusing" the Toggle X-Ray button (or Alt+Z shortcut) to actually toggle Fade Geometry.
While these are tightly coupled, this is a bit of an "unconventional" UI design choice [to say at least].
You are hitting a toggle button but nothing changes in the toggle button visually [because in reality, you are changing a different setting under the hood...]
If this cant be worked around, this should at least be mentioned in the tooltip?
Or should be substitute the button with the "real" thing in this scenario? [meaning we would take out the stuff from toggle_xray_exec and actually display a toggle for Fade Geometry? (or Show Bone X-Ray how it is called in code)]
(this way we would actually get a visual change in the button when we click on it)

Anyways, this aside I can see two issues:

  • Fade Geometry ON: clicking on mesh will not select the mesh for weightpainting [not sure if this has been reported before]
  • Fade Geometry OFF: bones are harder to select, only bone wireframe is clickable [that is known though, see T67208]

@Jeroen Bakker (jbakker), @William Reynish (billreynish) : could you share your thoughts on this?

Philipp Oeser (lichtwerk) renamed this task from Fade Geometry Unexpected Behavior to Fade Geometry / Show Bone X-Ray: Unexpected Behavior.Oct 18 2019, 10:27 AM
Richard Antalik (ISS) renamed this task from Fade Geometry / Show Bone X-Ray: Unexpected Behavior to Fade Geometry state changes selectability.Mar 20 2020, 1:59 AM
Richard Antalik (ISS) changed the task status from Needs Developer to Reproduce to Confirmed.
Richard Antalik (ISS) updated the task description. (Show Details)

Fade geometry is part of the Bone Selection Overlay. When enabled you're only able to select bones. The bone selection overlay was designed to be turned on only when you want to select a bone, and after selecting a bone to turn it off again so you could do the work you want. It is also added to a keyboard shortcut to quickly enable/disable it.
IMO this ticket is more about better description what it does as it only shows that it is a bone selection overlay when hovering.

Thanks @Jeroen Bakker (jbakker) for the clarification. The UI is indeed confusing, as it looks like the checkbox only enables "Fade Geometry".

The current interfaceMy proposal

I would also suggest changing the tooltip from "Show the Bone Selection overlay" to "Show bones in front of geometry, making it easier to select bones but impossible to select anything else". I'm not sure whether the "impossible to select anything else" is intended, though. If it's not, we'd better not document it (otherwise future bug report triagers will say "look, it works as documented, it's not a bug").

It is also added to a keyboard shortcut to quickly enable/disable it.

And this is where things are more confusing, as the Bone Selection Overlay toggle has no keyboard shortcut assigned to it. Rather, it responds to Alt+Z, which toggles X-Ray, which happens to somehow also toggle Bone Selection Overlay.

Maybe we should name the overlay "Bone Selection X-Ray Overlay" instead? That way there is at least some consistency within the naming, making it more reasonable that the "Toggle X-Ray" and "Bone Selection X-Ray Overlay" listen to the same toggle button at times.

Bastien Montagne (mont29) changed the subtype of this task from "Report" to "Bug".May 27 2020, 5:56 PM