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I'm designing a desk for my welding shop as a learning exercise to get to know BricsCAD. When I tried to design the top, something unexpected happened.
See attached drawing that has been stripped down to only the necessary layers. Note the UCS.
The Top layer shows a square tube steel base that needs a plywood top.
The Strange layer shows the steel base with the plywood top addition.
As soon as I put a rectangle on the base and extrude it 1/2" for the plywood, the entire steel base plus the top becomes one entity.
I've done this several times and I've seen the entity described as a Region, but not in this example. Everything still says Solid Face.
Why did adding the box to the base cause everything to become one entity?