An Issue trying to playtest

well, a leaked map does skip all the time consuming parts of the compilation.

When you compile without a skybox it doesn't calculate the lighting, so the compile is virtually instant but the result isn't something you would show someone unless you want to hurt their eyes.

However, if your map is taking upwards of an hour to compile on the default settings, you have one or more of the following issues:

1. Your map is fully detailed (which I highly doubt given the questions you've been asking)

2. Your map is absurdly gigantic

3. You have some extremely complex geometry

4. You've done some wierd shit with lights, probably naming them or having them turn on and off

5. Your computer is bad

Also, the skybox error is something that comes up in all TF2 compiles and means nothing.

You should check out this page and learn about how to optimize your map. Take in as much as you can.

Generally when most people have a problem with long compiles, it's due to not func_detailing their map properly. You should be using it a lot. If you aren't, read above.