Исправление CrX, (текущая версия) :
ХЗ, 3D не пробовал в нём. Наверное нет, судя по всяким руководствам:
Xephyr Can Be Used For Any Game That Runs On Linux And Supports The X11 Protocol. However, Some Games May Not Work Well With Xephyr, Especially If They Use Advanced Graphics Features, Such As Opengl Or Vulkan. You May Experience Performance Issues, Graphical Glitches, Or Crashes. You May Also Need To Tweak Some Game Settings, Such As Resolution, Window Mode, Or Input Devices, To Make Them Work Properly With Xephyr.
Исходная версия CrX, :
ХЗ, 3D не пробовал в нём.