The instruction cost of Saturate is almost free on most modern graphics hardware, so you can use this node any time you need to clamp an input or output value between 0 and 1 without effect on your material's performance.
3D 2.7 Shaders & You
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The instruction cost of Saturate is almost free on most modern graphics hardware, so you can use this node any time you need to clamp an input or output value between 0 and 1 without effect on your material's performance.