Intro PyroFx Part 2 Tutorial To view this tutorial, you must be a member of our Patreon Community. Intro PyroFx Part 2 Hello everyone! In this tutorial, we are going to learn how to control our smoke simulation with custom velocity. You will see this is really easy with volume vop and simple math. Share This project Liked it? Take a second to support Doxia Studio on Patreon!