One face of a CAD part, with the surface coordinates a cell grid can follow. Where a Solid is taken, a CAD Face counts as the half-space on the side opposite its normals — cut or intersect with it, or give it a thickness with Thicken Surface.
A CAD Face also fits an input that takes a Solid or a Number.
The half-space on the side opposite the face's normals, as a Solid: the exact distance to the face, negative behind it. Cut or Intersect with it; where a Solid is taken the face counts as this by itself.
The signed distance to the face, negative on the side opposite its normals; give it a thickness with Thicken Surface or drive a Range Map.
The axis-aligned extent of the face's triangles.
This face in a list of one, like every value that has a list type.
The body that contains this face.
Items that are each a CAD Face. One CAD Face wired where a list is taken counts as a list of one. A list wired where one CAD Face is taken runs the block once per item.