Hi, I basically have a map done with a couple of things yet to do: 1. Payload not working right - I seem to have everything coded right? but the map crashes as soon as I put in a team_controlpoint_master in - any ideas? If I leave it out map compiles right - but in game the cart has a glowing blue texture on it and there's no train_watcher at the bottom. Where should I look to find the issue? 2. Optimisation: Some parts are easy to figure out but I have a lot of open areas - can you look at the screenshots provided and give me some clues/tips? ie. I have put a hint brush across (width wise facing up) the lower part of the canyon where the river is and another across the top of the cave lake is this good? Although I have read some of the online tutorials and such when it comes to optimizing it I haven't got a clue as to what to do here on this one. Note: the cave areas / passages are all sealed with area portals to separate the caves / interior to the exterior - the wood passages near the cart start are all func_detail there so it's a box there and all torches are a func_detai also. Can you criss-cross hint Brushes like this + or join them side by side? Thanks for the help.