mne.gui.coregistration - coloured fiducial

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Thanks for the tip! I'll test it out tomorrow and come back if I run into more problems.

Best,

Amie

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It's going to be annoying to find and adjust the opacity of the right
points in `mne coreg` since there are so many things plotted. There might
be a global mayavi setting that disables all opacity but I'm not sure.

I suspect the issue is related to the version of mesa that you and I are
using but I don't have a suggestion of what version you should try that
will work. I did open an issue (
https://github.com/mne-tools/mne-python/issues/7977) to hopefully find a
good way to evaluate this.