2D pattern from 3D shape

[hijackgmh]

I am making a pattern for a tree skirt. How do I take the 3D section and project the correct 2D pattern, so it can be cut from cloth and sewn into a tree skirt?Xmas Tree Skirt.skp (107.5 KB)

[endlessfix]

Thanks for posting your model, that’s always a great first step. I’m looking now but I don’t quite understand the question. Could you try again to describe what you want to accomplish here?

[Geo]

You can unfold the shape to lay it flat.

Printing 2D surfaces from 3D body

@dmhmaestro To my knowledge there are three unfolding plugins available. Thanks to @slbaumgartner, my favorite, jf_unfold, was recently updated to work in SU 2016 and newer. Thanks to @jim_foltz for permission to re-release it to the community. jf_unfold_2018 prgsbar.rbz (4.2 KB) The .rbz file includes the following: • jf_unfoldtool_2018.rb • progressbar.rb EDIT: Oops … thanks for noticing that @DaveR

[endlessfix]

Ok I have a guess, I think you want to flatten the cone section so you can derive a 2d pattern. There are plugins for this, here is a native solution. I took as single facet of your cone and laid it flat. Then I drew two lines on the long edges to find the new center and rotate copied the 16 faces around that center. Is this the idea?

Wedge (1).skp (42.6 KB)

[hijackgmh]

Thanks to all!! I will try the plug-in and resort to geometry if I can’t make it work.

[hijackgmh]

Thanks for your help!