You will have to design / model, those simple shapes, just like on those 4 pictures :
🖼 Picture 01
It’s a large, simple ellipse, a bit thick.This shape is duplicated and rotated, using a pivot located at the bottom of the ellipse. Very simple structure.
🖼 Picture 02
It’s an oval with a deliberately imperfect shape.At the top, there is a small one, at the bottom a larger one, and all the in-between variations.Then, the whole set is rotated at 45 degrees from the ground.
🖼 Picture 03
These are three thick arcs (slightly rounded on the outer edges – see the green arrow).They are arranged in space so that they intersect each other.
🖼 Picture 04
There’s a block with soft/rounded corners, made of 5 main shapes.At the back, there’s a wall made of hexagons with very slightly rounded corners too.They are tightly packed but there’s a very small gap between them.Their depth is varied randomly, but the whole remains harmonious.