Can I make a circular detail viewport?

In AutoCad I had viewport from shape. Any such thing in rhino? I’d like to make a circular detail.

This is possible in Rhino 9 WIP.

_Detail
FromCurve

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You can make square detail and use a hatch to cover the rest.

THis may work in Rhino 9 WIP: Rhino 9 Feature: Non-Rectangular Details