If it doesn’t convert properly it might still be a surface at that point. If it converts properly, it will be a solid gray object just like the other solids. You want the “make this into a solid” button. The “make this into a surface” button is the one that is selected by default.
So what happens is when you right click on the imported stl file and select “convert to base feature” you get a little tiny window with 2 buttons on it.
Heh, I was just looking for where that was to post it, glad you found it.
