how do I traverse the bsp tree ?
and how to use the vislist… and then how to render the face ?
is it GL_POLYGON or ?
I want a verry simple example if someon have one 
oh… it is for Quake 1 bsps
It may not be a very simple example, but you could always look in the Quake source code. It contains source code for glQuake as well.
I don´t understand the q1 source 
it is to much…
I found this link here in this forum when I search for quake bsp : http://cs-people.bu.edu/jisidoro/cs480/
And I want the source for assignment #4 the finnished source the source you can download isn´t everything only how to load the bsp file and that I know already.