Katana 2.0 Release notes
Re-engineered Geolib engine
Katana's scene graph processing engine has been re-engineered to deliver substantial gains in performance and interactivity. With intelligent data reuse, and the processing of scene graph data moved to a separate thread from the UI, Katana 2.0 offers a more responsive and satisfying look-dev and lighting experience.
Graph State Variables
With new Graph State Variables, you can control which nodes contribute to scene graph processing at a particular time. This can greatly simplify workflows where you might want to reuse node setups with different inputs or outputs. In this way, you can even set up a single Katana project to control the lighting for a whole sequence.
Gaffer Three is the latest incarnation of Katana's lighting control panel. With the new system, you can use additional Gaffer Three nodes to nondestructively edit upstream lighting, fine-tuning parameters for a particular shot while continuing to reflect overall changes made at a higher level.