Thank you It has occured to me that persia_b4 doesn't feature the laser flash effect, most probably due to a packrating issue. I'll have to be more cautious with the next release. I'll try to add some noisyness to the final release, by adding irregularity on some feature (mostly red side, of course). There are some brushes overlapped by sand that get a rather blackish lightmap in result. I've tryed to reduce to a minimum the non lighted surface, but I consider turning them into func_brushes instead. Do you know if it has a significant overhead ?