Houdini Stuff

Nicked from Walter.. Velocity is a vector.. Velocity=speed x direction. I was using this because some of my POPs had too much speed and ...

"v" is for RBD and pops.. "vel" is for volumes...

Sometimes you want to have pyro behave a certain way in a certain area. Eg.  the smoke should go from left to right, then suddenly shoot upw...

Create a VDB with desired turbulence/noise in whichever way you fancy. Make sure the vdb is called "vel". Keeps things neater.. ...

It's possible to make a piece of geometry, pump it through a PointVOP and give it some velocity, using constants, curl noise or whatever...