Help: Adding your own animated objects to UT levels?

[sp]

Can anyone explain or point me to a tutorial on how to add my own animated objects to a UT level?

For example, I'd like to be able to add environmental effects like rain, snow, lightning etc to a level.

I'm not really looking to add my own 3D mesh type objects, just smaller things like rain drops, clouds, etc more along the lines of an animated sprite.

I've scanned the primary web sites but have been unsuccessful in finding any pointers to this general concept.

As far as I can tell, nothing on the Unreal Tech page explains how to do this either.

Any help/pointers would be appreciated.

[Ohsk]

What you want is a particle system, I used to have a demo
of one that generated snow, rain, some cool stuff, but it was not to be released to the public so i eventually erased it, I was hoping it would be out for UT by now( I got it while working on a mod project that never finished) wheel of time has some cool particle effects, the demo of the snow falling i had was awesome, anyway it should be out sometime I hope.

[Fuzzpilz]

In CTF-Dreary and DM-Zeto, you have rain/snow outside the windows. As far as I know, these are simply done by placing sheets with animated/panning textures in front of them and putting a WetTexture on the floor. If you want rain or snow directly in your map, i.e. in areas where people can walk, you'll have to use several sheets and to make sure they are NEVER seen from above. I know of one map that does it, but I forgot its name. DM-Hysteria, I think, but I'm not sure.