About Merging Extruded 3D Spaces

You can merge a non-associative 3D freeform space into a 2D space or extruded 3D space. In that case, the base profile of the 3D freeform space is used for the merge. You cannot merge a 2D or extruded 3D space into a 3D freeform space.

The following properties of the first selected space are applied to subsequent spaces merged into it: