I’m mainly working with 3DS Max and Houdini, in which my FX workflow in 3DS Max is heavily based on plugins like PhoenixFD and tyFlow. For lighting, shading and rendering I prefer VRay, but I already started to work with Karma in Production. In the past I was also using Realflow and the 3DS Max Plugins Frost, FumeFX, Krakatoa, Stoke, XMesh and Rayfire.