71ad9a48_apping_Tutorials_and_Resources__Description
[Title] Beam & Sprite Effects [Author] Skals [Description] 
This tutorial covers some amazing entities like env_bubble, env_funnel and env_shooter, and it teaches you how to use env_beam to create shockwave and alien teleportation effects.
TWHL: Half-Life/2 Mapping Tutorials and Resources
Description