In order to allow Skybox to access all folders and files, I modified this file (~/.local/share/Steam/steamapps/common/SteamLinuxRuntime_soldier/_v2-entry-point) so it starts as follows:

#!/usr/bin/env bash
shift 2
exec "${@}"

Credit to NoXPhasma and yao mtc

• It resets your viewing angle every time you go on the menu, it's both annoying and useful.
• Auto detection of video settings could be better, I mostly have to enter the settings manually. It would be excellent to define a default behaviour.
• Excellent otherwise!

Poor but OK FPS for 5-8K video

Crashed a few times, seems random