I have one problem, when I import some Files for example one of these furniture rolls (https://www.cgtrader.com/items/334443/download-page)
In this case I downloaded the SketchUp file and imported it.
But now it is not possible that I can edit the imported model as a model that I have created directly in Rhino.
For example, I want to split the imported role so that the outer edge can be assigned a different material than the middle part of the roll.
If it were a volume body created in Rhino, I could use the command “cut with wire” to divide the role with the circle.
However, since it is an imported model, I can not edit it. Is there a way to make imported models of Rhino self-assemble, so that these are then a volume body?