Hi all,
I have a shape that I want to extrude into a solid and then I want to insert a series of surfaces into the solid to extract the middle part. I have included a drawing that may make this more understandable. On the left is the solid created from extruding the outline. On the right is the internal surfaces that I would like to use to create a hole in the solid with the internal edges defined by those surfaces. I can't just extrude an external and internal outline because the internal surfaces have some angles in them.

I've tried to use the Merge command but I couldn't get it to work the way I needed. Then, just for the halibut, I tried the Trim command, but it didn't work either. Can anyone tell me how to create that hole with the slanted sides in the middle of the larger solid?
Thanks,
Mark

Never mind!
I found a way to do what I wanted to do using the Boolean Diff command. I created a solid using those internal surfaces and the Planar command. Then I used the Diff command to subtract that solid from the middle of the larger piece.
I know you can create just about anything with MoI, if you just know the approach you should take.
Mark

Hi Mark, it sounds like you've got it all figured out already - yup if you extrude the outer piece you can then select it and use Boolean difference, selecting the inside wall as the cutting object. That will then divide the extruded object into 2 pieces and you can select the inner core piece and delete it to give you your desired result.

- Michael