What is an example of when I can use the 'Clamp' option in the MixRGB node? In Blender Cycles, in Shader nodes, the MixRGB node has an option "Clamp" that says: "Clamp result of the node to the 0..1 range". I can't think of a scenario where the node would output a result that's outside of this range. There's already a factor slider to mix the two color inputs, and for each color input, the slider options are already clamped between 0 and 1.

What is a scenario of when the MixRGB node would output a result that's outside the 0-1 range (and therefore is a case where "Clamp" can be useful)?
The mix node can produce results outside of the 0-1 range. For example, white divided by (almost) black gives a very high value. Take a look at this node setup:



I took 2 mix nodes, set them both to add, gave them both an input of '1' (white), and subtracted the end result with '1'. The final result of the nodes without clamping is '1' (white), while the result of the nodes with clamping is '0' (black).