Can I Haz Tips? :3 (Outdoor maps)

[DRedshot]

Read these:

http://wiki.frictionalgames.com/hpl2/tut...tutorial_3
http://www.frictionalgames.com/forum/thr...ght=skybox

lots of lighting will make it look good. If it's a sunset use yellows, oranges and blue for shadows.
use the grass in static objects, but remember to turn collisions off. don't leave anywhere totally pitch black unless it's nighttime, and use billboards where appropriate

edit: guy above beat me to it, but the second link I gave should still be useful