In this video, I explain the difference between a surface that looks flat and a surface that is actually planar.
This matters a lot when you work with fabrication, paneling, facades, fashion, or any workflow where geometry needs to be cut, unfolded, or built accurately.
The main idea is simple:
- Planar means the surface sits on one single plane
- A tilted surface can still be planar
- A surface can look flat but still fail the planarity test
- Triangulation can break curved surfaces into planar pieces
- More divisions can give a closer approximation of the original shape