Surface with opacity < 1 not showing

@marcomusy nice package! Thanks.

I have just started to play with vedo, and would like to visualise some terrain with water over the top. I need to make the water transparent, so tried to use opacity = 0.5. But on my system this seems to completely make the layer disappear.

I tried one of your examples, examples/advanced/geological_model.py and have a screen dump below. I hope you can see that some of the data sets are missing (the ones which have an opacity set).

My system is from vedo --info is

_________________________________________________________________
vedo version      : 2022.2.3   https://vedo.embl.es
vtk version       : 9.1.0
python version    : 3.9.12 | packaged by conda-forge | (main, Mar 24 2022, 23:25:59) [GCC 10.3.0]
python interpreter: /home/anuga/miniforge3/envs/anuga39/bin/python
vedo installation : /home/anuga/miniforge3/envs/anuga39/lib/python3.9/site-packages/vedo
system            : Linux 5.4.72-microsoft-standard-WSL2 posix x86_64
monitor (primary) : default, resolution=(1368, 912), x=0, y=0

I use MobaXrerm as my XServer.

By the way I am also getting this warning/error

  File "/home/anuga/miniforge3/envs/anuga39/lib/python3.9/site-packages/vedo/plotter.py", line 3720, in _keypress
    elif "KP_" in key:  # change axes style
TypeError: argument of type 'NoneType' is not iterable

[stoiver]

Yes I can definitely live without it!

Thanks for helping so much in tracking down the problem.

[marcomusy]

i was suspecting that! this is what it does: https://en.wikipedia.org/wiki/Depth_peeling

It’s probably a graphics card issue, but i’m not sure, I guess you can live without it?