SolidBSP [hull 0] 500...1000...1500...2000...2500...3000...3500...4000...4500...5000...5500...6000...6222 (1.48 seconds) Warning: === LEAK in hull 0 === Entity light @ ( 940,-1340, 172) Error: A LEAK is a hole in the map, where the inside of it is exposed to the (unwanted) outside region. The entity listed in the error is just a helpful indication of where the beginning of the leak pointfile starts, so the beginning of the line can be quickly found and traced to until reaching the outside. Unless this entity is accidentally on the outside of the map, it probably should not be deleted. Some complex rotating objects entities need their origins outside the map. To deal with these, just enclose the origin brush with a solid world brush Leak pointfile generated SolidBSP [hull 1] 500...1000...1500...2000...2500...2580 (0.38 seconds) SolidBSP [hull 2] 500...1000...1500...2000...2220 (0.36 seconds) SolidBSP [hull 3] 500...1000...1500...2000...2500...3000...3500...3778 (1.14 seconds) 10.50 seconds elapsed