Hi Pilou,
Your collection of shapes are intriguing have you considered turning some into reality - cast as bronzes or aluminium - the lost PLA process lends it self as a very economical way to produce a cast ready pattern that any investment cast foundry can work from. Any filament 3d printer could print the master shape to go straight to casting.

Here is a DIY example on youtube.

https://www.youtube.com/watch?v=yK9puMFP1Pw

Thanks for your input with the visuals just the same.