Compiled this from several sources:
10 Units = 1 Foot
1 Foot = 0.304 800 609 6012 Meters
A person in UT is 60 Units (6 F)
A person eyes is 50 Units (5 F)
The closest a person can get to a wall is 20 Units
A persons head bobs vertically up to plus-or-minus one half foot when walking
Steps
· Any step that is 32 (2 feet) or fewer units tall or smaller is climbable.
· Any step that is 48 (3 feet) or more units tall is unclimbable. Useful for railings and ledges.
· Try to avoid steps or railings between 32 and 48 units (2-3 feet) tall, because one can’t reliably predict whether a player will be able to climb it or not.
Doors and grates
· Do not create grates on the floor where the player can walk. The player will get stuck in them. A grate is an opening that the player can stand on but is too small for the player to fall through.
· An opening 48 (3 feet) units wide or more is a door and the player can go through it.
· A player can not go through an opening 32 (2 feet) units wide or less.
· You can make tricky doorways designed to only let small players through, i.e. doorways less than 32 (2 feet) units wide. If you do this, only do it with a small doorway, not a long passage. If the player barely fits, she can go through a doorway easily but may get stuck on a long passage.
Ceiling
· For best results, the ceiling should always be at least two feet above the player's head, and it looks best when significantly higher. In regular architecture, ceilings under 10 feet high are uncommon.
· Don't create ceilings (low doorways or slanted ceilings) where the player can hit his head on the ceiling. Though these situations aren't disastrous, the engine doesn't handle them well and movement becomes choppy.
V-Passages
· Avoid passages that get progressively narrower if there's a chance the player will get stuck at the end of one. The collision system makes thin passageways difficult to deal with.
Wedge sides
· Avoid creating buildings with sides that look like wedges (30 degrees or less). The player gets snagged on these. This only refers to exterior wedges (outsides of objects), not wedge corners in rooms. Wedge corners in rooms are fine.
Grades
· A slope less than 20 degrees behaves exactly like a floor (and is actually considered a floor). Players can move on these without obstruction.
· A slope between 20 and 35 degrees is a grade. The player can move up these but she slides and must continually struggle to climb to avoid sliding all the way down.
· A slope over 35 degrees is unclimbable.
This was posted by Latch 2-4-2000 in a thread called "Unreal Scale". The thread was started 2-3-2000.
He got it from previus threads and other sources.
I hope it helps you a little bit
Was ich warf das fing ich, fing auf, fing ich auch.