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Lerp

Blends A and B by Alpha. 0 gives A, 1 gives B, and Alpha is clamped so you cannot extrapolate past either end.

Lerp node

The Lerp node

When to use it

Blends A and B by Alpha. 0 gives A, 1 gives B, and Alpha is clamped so you cannot extrapolate past either end.

Fine for mixing two parameters or two masks. Select is the one you want when a threshold on a third value drives the blend.

For combining two shapes, Smooth Union. A lerp between two distance fields is not the distance field of anything, and it meshes as a mushy compromise between the two.

Pins

Pin Type Description
A Number What you get at Alpha 0.
B Number What you get at Alpha 1.
Alpha Number How far between A and B you want to land. Held inside 0 to 1.
Pin Type Description
Result Number A blended towards B.