Hi guys,
I hope I will find help here 
!
I didn’t find any topics about convert planes to curve. I would like to convert hair cards to curve to use them as guides to create hair.
When I tried to find something about it I always find the opposite and I am sure it is doable with the new geometry node.
I don’t really know this part of blender, I mean I have some basis but not enough to have an idea to know how I can proceed to do it 
Do anyone have an idea about how we could do it with the geometry node ? I am sure it could also help other people
Thank you
Yeah… your probably not going to find one. I get what you want to do, which is to take hair made of Cards and use that hairstyle converted to curves to use as a hair guide in Blender.
( That’s harder to say than the description of what you want to do)…
Essentially…take the hair to cards, but run it backward.
I only found one thing about it for Houdini…HERE
but unless you have Houdini it won’t help you…
You could try this…it is going to take some extra work and properly fail on most things ( hard to tell) but it converts Daz hair cards to Blender Particle hair and that is a lot closer to getting to hair guides ( curves) HERE
Maybe like this with shortest path and selecting the verts top and bottom (manual or vertex group)
do you have an example of yr cards? as this is not quite the houdini solution
Could be a start.
Hope that helps
We can’t read your Node Tree just way too small…
Thanks…that will help him out ( oh and me too)!
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