Help with a "First Time" l4d 2 map?

[iamhoops]

Let me begin by saying I wasn't sure if this thread belonged here or in the mapping help section of the forum, but since my questions are specifically about Left 4 Dead 2 mapping, I figured this made sense.

I can use hammer to make maps. There's no problem there. I can make functioning maps for every source game out there, but not Left 4 Dead 2. When I compile and run a l4d2 map, the sky is black and glitchy like I have a leak in my map, even if I don't, and it seems that most of the control over zombie and survivor-bot AI comes from editing the nav, which I have found both frustrating and confusing.

Does anyone know of a good tutorial out there for people like me who know how to map, but can't make a functioning l4d/l4d2 map to save their lives? Sorry if this is a question that has been answered or that can be easily google-searched, but I've searched the forums here, and I've searched on google, and the best I've found are blurry videos where someone takes 20 minutes to tell me how to make a room with a handful of entities in it, and then spends 30 seconds explaining the nav/console commands needed to get the map working.

[Phott]

There were some tutorials I used, especially for editing the nav stuff, unfortunately I don't have the links anymore. But they were some really good video tutorials, should be on youtube.

A quick search and I found something that might help:
http://www.youtube.com/watch?v=xLjxv8kDQBM

[iamhoops]

Ok, sweet. That actually looks like it might be useful. Thanks. I'll keep looking on youtube if I need more help. Maybe I'll even put a l4d tutorial on interlopers if I can figure out what I'm doing.

[Dr.Boo]

The glitchy sky is because the standard skybox (Map-->Map properties-->Sky name I think) in L4D2 is an invalid one. You have to change it to a L4D or L4D2 sky or make one yourself;
Here are the defaults (for L4D1 skies you need to install the addon support tool)
http://developer.valvesoftware.com/wiki ... d_Sky_List
http://developer.valvesoftware.com/wiki ... 2_Sky_List