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1: How do you get a func_train to be REALLY loud? Loud like the trains in HL2.

I have a func_train that goes by, and it's quiet as a mouse; only hearable from like 30 feet away, barely.

2: How do you setup a particle system? I hear making your own particle system is no easy task. I just want simple smoke that takes a very long time to fade, and that I can link to the train.

3: My map doesn't seem to be able to compile vvis unless it's on "fast" mode. Never gets past around "...1...2...3...4.", even with 18-hour compiles on my AMD 2800+. I've gone through EXTENSIVE cleaning up and optimizing, with little progress in compile times, except of course Fast mode. How do I fix this?

My map is big, but not THAT big. (see here)

However, the level sits within a quite large level box. I needed room for scenery and enough space for the train to run in large circles (without hearing it).

Level box is this big compared to level - seen from overhead:


Green stuff is func_detail scenery. Yellow lines is train path of invisible train, intended to just emit sound and smoke.
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