How to cut at vertex position of another object? I want to cut the top face of the cube exactly along the bottom edge of the plane. What would be the best way to do that? When I use the knife tool on the cube, it doesn't snap to the vertices of the plane, so it never ends up being precise.
In this example I have both meshes in one object, but it would be even more useful to just cut one object based on another objects vertices/edges without having to combine them.
Is there something like 'cut edge at cursor'? That way I could set the cursor to the vertex first.
Thanks!
If the plane and cube belong to the same mesh, in Edit mode, you can use CtrlF Face Menu &gt; Intersect (Knife). It has 3 modes:

(Illustrations exploded to show separate parts)

All: all the results of intersection are split to separate islands
Cut: Edges are created, but not split, at intersections in all parts
Merge: Edges are created at intersections, all vertices merged, resulting here in an internal face.