Gingerbread Man on 25/2/2005 at 22:57

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I didn't play with skies at all, mainly because I assumed they are the same as Unreal and I was more interested in focussing on the New Stuff.

In the event that it is the same as Unreal (and I can't see why it shouldn't be) what you do is this (quick and dirty):

1. Create a subtracted brush outside the mission area.
2. Stick a SkyZone info actor (again, I'm running purely on Unreal here... slight differences may exist) in the DEAD CENTER of that brush.
3. Texture that brush with the sky textures, set their flags to Unlit (or muck about with lighting if you want)
4. Select all faces you want to have sky on them in the mission area. Right-click and set the Fake Backdrop flag in the texture properties.
5. You probably have to stick a ZoneInfo (or equivalent) actor in the mission area and make sure SkyZone is set to True. (edit: Maybe I'm getting confused with TerrainInfo here... You night not need to do this, but since everything I've built in the last god knows how long has involved terrain somewhere, I always zone things up as a matter of mise en place)

As I say, that's how you do it for Unreal.

Better skies include cloud planes and whatnot in the skybox brush, but them's the basics for Unreal. Again, I'm assuming it's the same or very close in T3Ed, but I never did check.

(edit)

The actual texture on the mission-area sky faces doesn't matter at all. With Fake Backdrop flagged, it will receive whatever the SkyZone info actor (which acts like a camera) sees. So usually people paint the mission-area sky faces with something garish and easily-recognisable (like Jorge or the Ogre texture) -- personally, I use a bright green thing that says SKY on it.