An Elevated Surface is a 2D surface scaled (in the local surface normal direction of the parent) based on a variable value. Elevated surfaces resemble topographic maps and are useful for accentuating relative differences in the value of a variable. An Offset Surface uses a rigid-body translated origin part translated within a 3D parent part, to create a new part using the geometry of the origin part, while getting variable information from the parent part. In other words, an Offset Part results from using a translated origin part to clip a 3D volume parent part.