Custom particle?

Can someone create a custom particle for me?
I want it to be a sandstorm that is 4096 in radius, inside of a sphere, if that is possible.
It is for my map sb_andromeda and i would like someone to make this for me.
I will give them credit for it.
Can a mod move this to request section?
At least, if thats where this should go… im not quite sure

maybe you could make a sand texture that spreads across the area u need and put it on a func_tanktrain as a testhing¿?

That wouldn’t work.
I know what i want, and it cant be done with a texture.
thats why i requested a particle.

Oh and be sure to make the particles be removed once they touch world, or go out of the sphere