Labels:text | diagram OCR: A 1 (a,b) B 2 (e,f) D 3 (c,d) E - leaf = node 6 7 (g,h,0) 6 2 1 F 1 7 E 4 d C 3 B TA -= polygonal wall (from above) ..... = splitting surface (from above) A-F = node 1-7 = leaf a- i = polygonal surface Figure 1: In Quake, polygons are stored in the empty leaves. Shaded areas are solid leaves (solid volumes, such as the insides of walls).