5th version of animated light rays from sun entering through window, and interacting with the environment. A masked duplicated layer of the window was added above the BG plate, then I applied Trapcode Shine for the light rays effect. I then used CC Particle World to create animated dust particles that drift upwards and around in the air, and crushed the mid-tones and shadows/increased highlights as the stronger light enters the room.
this video is a full render video test of sun light entering through a window done by masking window opening with trapcode shine. Then adding floating dust particles that are visible only when the sun light shines on them.