I learned a LOT from watching UEAKCrash's stream this weekend, during the 72 Hour Contest. Thanks SO much, Crash, for streaming, losing sleep, playing along with everyone who threw suggestions, questions, and lame jokes your way. You're a real sport. I'm very new to mapping (I actually just tool around Hammer, defragging my brain at the end of a long day; I have no actual completed maps, nor serious aspirations to be a published mapper), but among the things I learned this weekend were things like: My visleafs/hint-skip won't work if my light_environment is out in the void. Did not know that. Duh. Paste-special. That is all. Skybox texture won't cut up and deface buildings or structures that I've turned into func_details. At the risk of confessing you didn't know something that other mappers would point, laugh, and Simpson's-Nelson you...what things suddenly crystalized for you as "ah-hah" lessons? Thanks to anyone who is willing to share!