Can I use RoomBox with another rendering engine?
RoomBox is natively compatible with V-Ray, Enscape, and Thea. You don't have do to anything for these three rendering engines.
If you use Lumion, Twinmotion, or D5, check out these articles:
If you want to use RoomBox with any other rendering engine: The specific steps will vary from engine to engine, but in general you need to convert the RoomBox materials (the materials applied to the room geometry) to "emissive", "self-illuminated", or similar