Is there a way to extrude an object from it's negative side?

[bobopet]

I'm trying to do an extrusion and this is what I get. The most painful thing to me in maya is extruding. Is there a way to do this and end up as if you'd do a normal extrusion?

Video: https://gyazo.com/0eb039784385b2f80ea273ca2ef70c7a

[begerdesign]

What you do in the video is not an extrusion, but a scaling.

[damaggio · Accepted solution]

Your object has no thickness that's why , you should not have made the top part of model by extruding an edge from a solid shape.

this can render fine but it will create problems later.

you can either detach the top area and extrude or select the profile edges and do Modify-Convert edge to curve and then do a clean revolve of the shape.

[bobopet]

It is an extrusion. I am doing shift + scale, not just scale

[Anonymous]

Either way. You cand do what he says about detaching the shape or extrude it and then select the black faces and invert the normals. They are reversed. That´s the reason why they are black.