Hi there, we are trying multiple VM solutions to potentially suggest them to our clients. With the most recent Parallels 13.3.2. and a fresh CentOS7 install we are experiencing problems with the OpenGL GLX Visual 0x64. 0x21 works just fine which is essentially the same as 64 with the absence of alpha buffer: visual x bf lv rg d st colorbuffer sr ax dp st accumbuffer ms cav id dep cl sp sz l ci b ro r g b a F gb bf th cl r g b a ns b eat ---------------------------------------------------------------------------- 0x021 24 tc 1 24 0 r y . 8 8 8 0 . . 0 24 8 16 16 16 16 0 0 None 0x064 32 tc 1 32 0 r y . 8 8 8 8 . . 0 24 8 16 16 16 16 0 0 None Is there any known bug in the OpenGL driver regarding the alpha buffer? Thanks