Hello, I've come to help. As a community member I feel like I should help the developers to find places to get help (sources of material that could help if needed). I could have left this post on the suggestion forum but since it's a technical issue I figured it allows it to be here, but I'm only human so different interpretations happens.
As we all know we don't know if there is going to be a Linux version of D:OS 2 but I will leave this here anyways and thank you for giving us a good game regardless:
Tips and tricks for OpenGL:
https://nlguillemot.wordpress.com/2016/11/18/opengl-renderer-design/ [18 Nov 2016]
(Source:
http://phoronix.com/scan.php?page=news_item&px=OpenGL-Renderer-Design-Tips) [27 Nov 2016]