Hi 3dcnc, re: how to set environment variable, search for something like "linux mint set environment variable", this was one result:
https://superuser.com/questions/1171837/how-to-set-global-environment-variables-linuxmint

or this:

https://justrikka.wordpress.com/2012/10/05/how-to-add-environment-variables-in-linux-mint-13/

You'll put something like

export __GL_MaxFramesAllowed=1

in the file it mentions.

- Michael