By the way, while this is usable, it isn't physically correct for fog. SM should update the Atmosphere fogginess relationship to distance, just as they updated the light falloff.

The equation being used to calculate the "fogginess" factor is Clamp((x - start) / (end - start)), which is a linear increase, where x is the distance from the camera.

The correct equation is x / (k + x), where k is a user-controlled parameter that defines the distance at which the fogginess is exactly 50%.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)