[Issue] Partial part transparency makes the window transparent

[nils-van-zuijlen]

Is there an existing issue for this?

• I have searched the existing issues

Forums discussion

No response

Version

0.20 (Release)

Full version info

OS: Manjaro Linux (KDE/plasmawayland)
Word size of FreeCAD: 64-bit
Version: 0.20.2.29603 (Git)
Build type: Release
Branch: makepkg
Hash: 930dd9a76203a3260b1e6256c70c1c3cad8c5cb8
Python 3.10.9, Qt 5.15.8, Coin 4.0.1, Vtk 9.1.0, OCC 7.6.3
Locale: French/France (fr_FR)
Installed mods: 
  * fasteners 0.4.52
  * freecad.gears 1.0.0

Subproject(s) affected?

PartDesign

Issue description

When making a part partially transparent (between 1 and 99% transparency), the part becomes transparent beyond the FreeCAD window and lets the windows under them be seen.

Anything else?

This may be related to #6177

After restarting FreeCAD, without having made any updates, I cannot reproduce :sad

Code of Conduct

• I agree to follow this project's Code of Conduct

[chennes]

Can you clarify your final comment there? Is this something that you observed once, but can't get to happen again? It seems like a graphics driver or window system bug to me: if even you can't get it to happen again I am not sure how anyone could track it down.

[luzpaz]

This looks like the old 'Known Issue' for old graphics cards.

[nils-van-zuijlen]

Can you clarify your final comment there? Is this something that you observed once, but can't get to happen again? It seems like a graphics driver or window system bug to me: if even you can't get it to happen again I am not sure how anyone could track it down.

Yes, it mean I observed it once only. I am creating an issue so that if anyone bumps into the same issue, they can continue searching that bug.

[concretedog]

I have the same issue here on Manjaro Xfce with 0.20.2, photo's below with about info.

If I make a datum plane or set an object to have some transparency then my manjaro desktop bleeds through in the preview pane!

[luzpaz]

Found related (dupe?): #6177

[luzpaz]

@PLChris is this the known graphic card issue ?

[Chacha75]

I have the same issue with both FreeCAD v 0.20 and 0.21 in Manjaro. However the issue disappears when I turn off Compositing in XFCE.

CPU: 6-core AMD Ryzen 5 4500U with Radeon Graphics (-MCP-)
speed/min/max: 1560/1400/2375 MHz Kernel: 6.1.44-1-MANJARO x86_64 Up: 8h 1m
Mem: 2.71/7.13 GiB (38.0%) Storage: 476.94 GiB (65.1% used) Procs: 283
Shell: Bash inxi: 3.3.29

OS: Manjaro Linux (XFCE/xfce)
Word size of FreeCAD: 64-bit
Version: 0.21.0.33675 (Git)
Build type: Release
Branch: makepkg
Hash: 41b058e
Python 3.11.3, Qt 5.15.10, Coin 4.0.1, Vtk 9.2.6, OCC 7.6.3
Locale: Hungarian/Hungary (hu_HU)
Installed mods:

• Assembly4 0.50.2
• fasteners 0.4.59
• sheetmetal 0.2.63

[luzpaz]

However the issue disappears when I turn off Compositing in XFCE.

@nils-van-zuijlen can you reproduce workaround ?

[Chacha75]

@nils-van-zuijlen You can find it in Window Manager Tweaks >> Compositor tab >> Enable display compositing

[concretedog]

Just to confirm I've just replicated this workaround on the same setup as I listed having the problem with on April 15th, sorry for the delay haven't used this Manjaro machine for a while.

[zoopp]

Is this similar to what I reported here: swaywm/sway#7739? (see attached videos) The conclusion was that it's likely an application specific issue caused by using "an alpha format when they don't intend to use the alpha channel".

[zoopp]

OS: Arch Linux (sway)
Word size of FreeCAD: 64-bit
Version: 0.21.2.33771 (Git)
Build type: Release
Branch: makepkg
Hash: b9bfa5c5507506e4515816414cd27f4851d00489
Python 3.11.6, Qt 5.15.11, Coin 4.0.1, Vtk 9.3.0, OCC 7.7.2
Locale: English/United States (en_US)
Installed mods: 
  * Manipulator 1.5.0
  * fasteners 0.4.66
  * Curves 0.6.13

Seems to have gotten worse. Right click menu and toolbar menus have become completely transparent for me.

2024-01-24.15-19-39.mp4

[Chacha75]

Seems to have gotten worse. Right click menu and toolbar menus have become completely transparent for me.

I'm not sure, if it's the same issue. Only the menus are transparent, and you can see the Freecad window beneath it. The FreeCad window itself is not transparent.
Maybe it's a theme issue. Try to switch back to Classic theme. It solves this problem for me.

[zoopp]

Ah, you're right. I played a bit with the theming over the weekend and after re-applying the theme the menus become solid again for a while after which a Qt error (or warning, can't fully recall) is logged followed by them becoming transparent again.

Seems to be indeed a different issue. I'll take a better look at it some other time.

[Chacha75]

I've found a much better workaround:

In Kvantum Manager under 'Configure Active Theme' on the 'Compositing & General Look' tab add freecad to the list of Opaque apps