made with cinema 4d
excellent !!! comment fais tu l'effet rentrant de la spirale ?
i used a cube , made it editable , selected all sides and used a matrix extrude with 10 steps , 100cm per step , 127.096% ( i believe it was , writing this from memory ) on scale and a rotate of 18° , deleted the selected polygons and bridged the unconnected sides , after that i just played around with the ring selection