Hi,
am I missing something or does SubD symmetry only support 2 point input to define the symmetry plane? Can´t we have 3 point input to define a plane? Seems to work with other planes, haha 
Thank you for consideration or correction 
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3 point input would be nice. In the meantime you’ll have to change your CPlane…
Added https://mcneel.myjetbrains.com/youtrack/issue/RH-77339 Thanks!
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I think
_mirror
and
_reflect
should have the same options, option-names, and approaches how the plane is defined.
and the same / similar widget / screenfeedback.
as I already wrote somewhere else the current naming (mirror) is not consistent:
x = XZ Plane ( x is one axis of the Plane)
y = YZ Plane ( y is one axis of the Plane)
z = XY Plane ( z is the normal of the Plane)
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Noted thanks, I added this to the request. I can see all but the Copy option applying to Reflect.
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