Gel Flow Particle SystemsUploaded May 22, 2011 by ChickenMobile
This is a map with a couple of example Gel-Flow Particle Systems. This is how Valve made Gel look like it is flowing through pipes (and curving in them). You can just copy and paste these into your maps, however keep the angles of the info_particle_system's the same to the info_target as this is how it tells which way to curve the Gel. I would suggest you to ignore the different "Control Points" as decompiling a Valve map shows that they only used 1 info_target for 1 particle control system. Searching through the Portal files I couldn't find the name of a water one but I am pretty sure that there is one. If you do find out the name of the particle system, then post a comment below and I will edit this thread.