Originally posted by Chirone it's probably better to have selected the other faces on the top of that cube you have and extrude those up for that particular thing you're doing less fiddling around after the extrusion Ok, it seems like extrude doesn't work good in negative. Well, yes in a cube like scenario like this one raising the rest is clever. But I only used the cube as an example to figure out why I could not do it in a boat model I am trying to do. Right now I am considering to do using a boolean and excavate a cube from the whole instead. Is that a standard approach?