Does this do anything? Is it just for Global Photon maps?

While rendering caustics (only), I can vary this from .01 to .1 to 1 and get no change in the rendered image, even while varying the Caustic Photon Sampling from 5 to 10 to 50…

Just wondering why it is there if it doesn't do anything. I thought it was there to roughly control how much influence each photon has.

-Craig

PS: I am using H7 because H8.1 seemed to have problems rendering the Photon maps for me.