Ok, i seek the help of someone that has rendered quake 1/2(preferably 2 obviously) bsp data to the screen. It was my assumption that the triangles are drawn using triangle fans. but im obviously doing something wrong as it looks almost nothing like its supposed to. the basic concept i got was for(each face) glbegin(gl_triangle_fan) for(each vertex) draw vertex }glend() } but it doesnt look correct to me. any ideas?