Hi everyone, I was wondering if anyone could tell me how i achieve the sucking/dust effect at the end of a vaccuum tube? I notice when i use a Point_Push and shoot a portal near it, the linked portal has the exact effect i'm looking for but i don't know what it's called!

The effect is a particle file. Use an "info_particle_system" entity, with "broken_tube_suck" in the "particle System Name" field.

Thank you soo much @3