When I extrude (vertex normals) outward, I give these faces some volume, making it no longer just plain flat faces:
https://gyazo.com/f21c91780b37273c3325a90b0a1ef6c5 (gif)
However, when I attempt to do the same but inward, you see that it does not give exactly the volume the way it does when I do it outward:
https://gyazo.com/5856edbaa9d5d491a2ad230f844078ab (gif)
I'm trying to create a shape similar to this:
I want to give the columns extrusion volume, but inward, not outward!