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IDProjectCategoryView StatusLast Update
0004594FreeCADBugpublic2021-03-29 17:02
Reporterdudo Assigned To 
Status newResolutionopen 
PlatformArch LinuxOSLinux 
Product Version0.20 
Summary0004594: Grid is transparent in respect to the window
DescriptionGrid lines, instead of being filled with color, are filled with whatever is "below" the FreeCAD window, eg. desktop wallper, other windows, etc.
Additional InformationThis is using fully up to date Arch Linux, using git version of FreeCAD, running under wayland / sway
FreeCAD InformationOS: Arch Linux
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.20.24407 (Git)
Build type: Release
Branch: master
Hash: 9f937f765d9c811535018110618056883b258837
Python version: 3.9.2
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: English/United States (en_US)



2021-03-11 01:16

reporter   ~0015498

It seems to be related to blending, like every mesh that's rendered with some kind of transparency shows the bug in action

(Additionally, note the z-fighting issues, unrelated I guess)


2021-03-11 17:34

reporter   ~0015499

On the same system under Xorg it works all right, no transparency issues, so this could be wayland specific


2021-03-11 19:47

administrator   ~0015501

Last edited: 2021-03-11 19:48

View 2 revisions

What graphics card/display driver are you using? Have you read the known issues as chrisb mentions in the forum thread?


2021-03-12 01:18

reporter   ~0015502

I've read the known issues but couldn't find any that would describe this behavior. The driver is Intel/MESA.

~> glxinfo | grep OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 4000 (IVB GT2)
OpenGL core profile version string: 4.2 (Core Profile) Mesa 20.3.4
OpenGL core profile shading language version string: 4.20
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
OpenGL version string: 3.0 Mesa 20.3.4
OpenGL shading language version string: 1.30
OpenGL context flags: (none)
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 3.0 Mesa 20.3.4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00
OpenGL ES profile extensions:
~> lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)


2021-03-29 17:02

reporter   ~0015576

I am also seeing this issue using FreeCAD 0.19.
It happens with both Weston and wlroots based compositors and not at all under Xorg/Xwayland.
I'll also add that setting a solid background color also causes the entire render area to be affected, not just transparent areas.

I do notice the following error which is only seen when running under Wayland:
Coin warning in glxglue_isdirect(): Couldn't get current GLX context.

Issue History

Date Modified Username Field Change
2021-03-10 20:31 dudo New Issue
2021-03-10 20:33 dudo Tag Attached: Coin3d
2021-03-11 01:16 dudo Note Added: 0015498
2021-03-11 17:34 dudo Note Added: 0015499
2021-03-11 19:47 Kunda1 Note Added: 0015501
2021-03-11 19:47 Kunda1 Status new => feedback
2021-03-11 19:48 Kunda1 Note Edited: 0015501 View Revisions
2021-03-12 01:18 dudo Note Added: 0015502
2021-03-12 01:18 dudo Status feedback => new
2021-03-29 17:02 dannixon Note Added: 0015576