env_sprite problem, and 3D beam creation.

Hi all,
I made a plasma gun in my map, and Im trying to make some visual effects but I have 2 problems, an env_sprite is not seen if the prop_dynamic is behind it and the env_beam is 2D, I wanted some 3D beam do you know the solution for those?
I wanted to make a beam effect like the dragon ball z beams in ESF mode.
Thanks guys