Get a Arc Radius Perfect with SubD

[simonsais]

Hey guys I am struggling to get a nice arc radius in front view of my object.
It is really a pain compared to meshes. Is there any workaround to get it nicer?

Thanks!

[martinsiegrist]

The outer object looks ok. The inner object however is missing a diagonal edge. Not sure how to describe this with words but look at the corners of a cube. That’s how your corner should look like…

[theoutside (Kyle Houchens)]

try rotating these edges to match your outer objects layout.

to get similar shapes, you need similar layouts for your topology-