But now, change the Hue parameter to .25. This means that the node will calculate the incoming hue, multiply it with .25, and update the output with the modified RGB value based on that change in hue.

Now I have to tell you that this business of multiplying a hue with a number is generally not that useful. It's hard to come up with anything other than changing leaves into fall colors as a reason for doing this.

But - what a beautiful and simple effect! It is exactly what you want for changing leaf colors! This is an unbelievable coincidence that a simple multiplication of hue so entirely mimics something from nature!!!

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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)