Hi Nick - what happens here is that as you move around, the point is not snapping on to the surface, it is hitting the world construction plane instead.

For version 1.0 it isn't possible to snap on to a point just at an arbitrary spot inside of a surface, you can only snap on to the edge curves.

> "Is going to be a future feature?"

Yes, I definitely want to add a surface snap in the future.

- Michael