Lerp / Blend option in noise and pattern components

It is not always clear when FF uses a blending approach rather than a simple interpolation scheme. Patterns and noises use blending and gradients use lerp (interpolation).

Also it is not given what actually IS the pragmatically correct approach - it depends on the actual construction. Sometimes blending is useful, other times lerping is useful and then mostly it doesn't matter since input colors are all opaque.

Since lerping is cheaper itself (computationally, compared to blending) and is more simple which in most component cases makes it possible to skip fetching either "Foreground" or Background depending on the weight, I propose this option be added where applicable ("Use fast lerp").

Well, it is kind of related. The Threshold is infact using that optimization opportunity I'm talking about. What you're doing sounds like a Clipping Tree variation..