I got some stuff i need to know here..
Lets see..

Is there a script for echoes (Whenever a character says something, it leaves an echo) such as in the crystal cave?

If you select t3-m4 and press caps-lock (First person), everything you see is blue, it appears that's the way t3-m4 sees the world,
same with hk47, except that its red.
Is there a way to edit this?
Are there image files in blue or red color that changes this or is it hard coded and can't be changed?
Is it editable with scripts?

Is there even such thing as an echo in KOTOR:confused:

Have an echo effect? That would not be a scripting issue but a sound issue. You would need to edit .Wav files with a good sound editor to create echo effects.

I see..
So all sounds used in a cave are different sounds?
Because lightsaber sounds, and voices, leave echoes when i'm in caves..