What I'm trying to do is split a rectangular prism into 2 sections whose lengths add up to that of the original object. Using the Project Split on a line across the top face of the prism does this, but I am left with a group of individual faces, not two solid objects. I tried using the section solids command in the model menu using a 2d rectangle intersecting the prism, and this works better because it leaves the prism intact instead of separating it into individual faces, but this deletes the other half of the object I'm trying to split. Is there a way to split a 3d solid into two sections without deleting half of it or ending up with a group of faces?