I've started to work on co_attila and i want to make it uniqe, and making new computer screens, holographic signs etc. are an easy way to customize, BUT:

I really dont know how to make that stripe-noise(i hope you know what i mean). i've checked all the PS filters, but i couldnt find anything that i could use...

If you know the solution please share:D

I know its not exactly what you'll be looking for but..

You can put the texture in a func_wall and give it renderfx 15 (Distort) or 16 (Hologram, Distort + Fade), and rendermode Texture, and renderamt 255

Its a bit fast, but it will work for a starting point.

Tv/screen scanlines is what you're after? Well you might want to have a look at creating your own patterns, google says:

http://www.webdeveloper.com/design/design_tv_scanlines.html

Might be just what you're looking for? As for entity settings cyhawk covered that...

Thanx. I had no problem with the entity part,(i have used already the ns holotextures).

I hoped that i dont have to create a new pattern, but find an easy way to success... but as i can see i must create my own pattern.

Thank both of you