Katana is the most widely used package for Lighting and Lookdev at major film vfx facilities ( MPC, ILM, Sony, etc ).

There is also now a Windows version available that should widen its use amongst freelancers and smaller studios.

All major renderers are available for it ( Renderman, Arnold, V-ray, 3Delight and forthcoming, Redshift )

Would be great to see substance integrated into Katana.