Nice render! [:)]

I haven't seen any parameters, to adjust a photons rate of decay, except for settings to control how many times a photon bounces. Used for ambient lighting.

Thinking about it further. In real life, the only thing that affects a light rays rate of decay (before hitting a surface) would be dust/smoke particles in the air or other scattering anomalies.
I haven't seen any method for Sunflow to produce volumetric effects. It's one of things I was hoping we would be able to add, to produce catherdral lights (visible rays of light passing through the air)


Another member. [:D]