General tab gives access to the shadow catcher option and Custom Light Evaluation.
Shadow Catcher: this option can enable a material to be a shadow catcher or not. This feature is used to integrate a model into a scene with a background image as with the Shadow Catcher, we introduce realistic shadows produced by IBL, sun and Thea point lights. In addition to these enhancements the shadow catcher can produce real reflections on ground plane. To enable real reflections, we add a basic layer to our ground plane and add a reflectance color.