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Entangled sphinx like curves. Finished isometric 3D and 2D sketch versions.
@tausbn Well spotted! I made the inner spiral counter clockwise first, but didn't like it - so I mirrored it and only used the red strand for alignment. Here is a special Taus version just for you :)
@karel1980 And here the horrible truth is exposed - it's a penrose object...
@karel1980 Here's a simpler view for you, maybe that simplifies stuff