Learn how to model a trellis ring using SubD geometry in Rhino 7.
Associated files for this tutorial can be downloaded here... https://files.na.mcneel.com/download/50425bf5-3bc5-11eb-987b-2fd281e9ee95/HeartShapedRingBlock.zip
More SubD tutorials in Rhino 7 can be found here... https://www.rhino3d.com/tutorials/#subd