Hi SUIYAN,

> You Said> in the future I would like to enable more cases where surfaces can get
> merged with Boolean Union. Currently it's only supported for 2 coplanar planes
> or when the 2 surfaces are trimmed pieces of the same larger underlying surface.

Right, that will be for things like the 2 surfaces are pieces of some larger surface like 2 pieces of a sphere with the same center and radius, or 2 extrusions from the same base curve and direction.

The surfaces from NSided are not like that.

- Michael