A field giving, at each point, the angle in degrees (0 to 180) between the Solid's outward normal and direction. Against the build direction, downward-facing overhangs read close to 180.
The Solid whose surface normals are measured.
The direction to compare against, such as the build direction; its length does not matter.
Values the block gives besides its output. The editor lists them under Properties, and an input can read one by reference.
The field read as a Solid whose surface is where the field is zero.
The box the field is evaluated in.
The field with its sign flipped (−f), which swaps inside and outside.
The field divided by its gradient length (f/|∇f|) so it reads close to a true distance; the zero set does not move.