We don't look at irradiance from below the hemisphere for this case, but is there any case where you're modeling a transparent film and would want to include the bottom hemisphere?
SourMongoose
For a semi-transparent area, you'd likely take the incoming light from the upper hemisphere and add it to light from the lower hemisphere mutliplied by some constant depending on material.
We don't look at irradiance from below the hemisphere for this case, but is there any case where you're modeling a transparent film and would want to include the bottom hemisphere?
For a semi-transparent area, you'd likely take the incoming light from the upper hemisphere and add it to light from the lower hemisphere mutliplied by some constant depending on material.