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I've been trying to figure out how to extrude a face inwards and when hitting another face going through it and removing the face. I basically would want an uninterrupted extrusion. This can be achieved by removing the unwanted face and then filling in the parts of the face that aren't interrupting the extrusion. But this is a tedious and not very good method. I was wondering if there was any better way to do this?

Block before extrusion Nonmodified block

Block after extrusion Block where inset has been extruded inwards

Face that I would like to be removed Face I want to be removed

I would like to keep the faces that aren't interrupting the extrusion enter image description here

Any help is appreciated!

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  • $\begingroup$ I suggest you start modelling from the lowest part of your object, so you don't need to extrude part of the plane inward. $\endgroup$
    – Sanbaldo
    Aug 17, 2021 at 18:06

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If I've got you right, after I insetting top and bottom faces simultaneously, it could be AltE > Extrude Manifold, followed by X > Delete Faces.

enter image description here

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  • $\begingroup$ oh ok you must be right about the question $\endgroup$
    – moonboots
    Aug 17, 2021 at 21:00
  • $\begingroup$ @moonboots Dunno.... I would never want to make geometry like this, anyway? $\endgroup$
    – Robin Betts ♦
    Aug 18, 2021 at 8:23
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If I understand correctly, you can select the bottom face and all the side faces, go into the Face panel and choose Intersect (Boolean):

enter image description here

In the Operator box choose Difference and Fast:

enter image description here

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