What commands can I use to create this effect on a 3d form?
InterpCrvOnSrf to create boundary curves for the strips.
Trim, or Split and Delete to remove the unwanted parts.
Another approach in the 3dm below for if InterpCrvOnSrf doesn’t work.
Offset a helix, loft the two and extrudesrf in the Z to create an auger looking thing with a hole where the shaft would be. Boolean intersect this with your object if it is already a shell or simply split and delete it if it is a surface. Depending on what shape you want to apply this to this may create issues on branching geometry such as where his arms meeting his body. There you might need to combine multiple of these augers and try to have them meet seamlessly.
Escher Twist.3dm (17.1 MB)
Thank you, your input was very good. I didn’t succeed with “Boolean” but I did it with “trim” and “Split”.
I appreciate.
Marcel
https://discourse.mcneel.com/t/peeled-effect/360?source_topic_id=36097
When offsetting the Helix, what command must I use? there are a few commands in “offset” command and I am confused as to which one to use?
Can you help?
Simply “Offset” which is a premade shorthand for “OffsetCrv”(not a command) and creates an offset parallel to your current CPlane. Your distance in my example is slightly less than the radius of the helix.