I've got a simple room here with a 5000 lumen 1m² rectangle light 2.5mm above the floor. I would expect that with it so close to the floor, falloff and spread would be negligible, and the lighting analysis should show about 5000 lux for the lit portion of the floor directly below. Here, I've rendered it with directionality set to 0.0 and 1.0, and get two different results (the 0.0 version is as expected, but the 1.0 version seems to be getting twice as much light on the floor, and the rest of the room is brighter overall from the reflected light).
Is this not incorrect? Where is the extra light coming from?
Is this not incorrect? Where is the extra light coming from?
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