I’ve been trying my hardest for a long while now, but i’ve had no luck beyond eyeing it. What units does Blender use for its scattering density value? I know that it’s probably not an actual unit like mass/meter^3 but actually probabilistic, and that’s fine too, I can use the measurements from light loss through the atmosphere as a standard candle against it. I could also use a link to the SSS shader, which does actually use metric, if anyone has the information.