Gl cull

Name: gl_cull
Default value: "1"
Cvar flags: None
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This variable toggles the use of internal OpenGL functions for removing covered
objects. When this variable is set to "1" the game will depend on the OpenGL
driver to use it's culling functions to remove certain objects from the
calculations because they are covered up and would not be seen anyways. It is a
good idea to leave this toggle enabled because it will increase rendering
performance.
0 = Do not use culling to increase rendering performance.
1 = Use the OpenGL driver's culling functions.