How do you extrude a shape without outer faces and edges? In Sketchup, if have a shape that I want to cut a section out of, I can use the pencil tool to draw an area and then extrude the area down (using the push / pull tool). The outside edges are removed:




In Blender, I'm trying to do the same thing but it isn't working in the same way. I used the Knife tool to draw the area I want to remove and extrude down, but the outer edges are still remaining:




I haven't yet figured out a way to manipulate the mesh to get the desired result after this extrusion.

Is there a faster / better way to do this in Blender? Is there a tool that behaves similarly to Sketchup's push / pull tool?
This feature has just been added to Blender.
It will be available from version 2.90(https://builder.blender.org/download/).
It's called &quot;Extrude Manifold&quot; and is located in the toolbox T, under the &quot;Extrude&quot; dropdown, Or by pressing Alt+E.

↑ Here I'm using Face select mode (3) but it works in vertex select too