Pinching an edge in the middle of geometry without additional creasing So, I'm modeling a car and I've encountered a rather unexpected problem. When I add subdivision modifier to my low poly starting model to smooth things out, I still want to keep sharp edges on some places. And some of those places are in the middle of other geometry. I've dealt with this before, always with adding additional creasing, but in this case, this ruins the shape of my model.

I ask for a way to sharpen edges in middle of other geometry, without adding additional creasing.

Oh, just for information, extruding edges inwards and then adding creases to newly created edges works only on right (look picture 4.).

Here are some pictures:




Edges I want to make sharp are those that already have creases on them.





Picture #1 in wireframe.





Original geometry.





Extruding edges inwards and then adding creases to newly created edges (works only on right).
Extrude the vertices in the corners, then add edge crease to the newly created edges:



These edges won't be rendered.

It seems that the direction has no/few influence on the result: