Here's my 3d modelling from Wouter Kroon's excellent design, The "Stingray". It's was a challenging yet very straight forward concept to create , which allow me to test Boolean tool "HardMesh" in Maya , while creating a great asset.
All materials are procedurals and there is no texture paint there.
Link to original concept from Wouter Kroon :
https://www.artstation.com/artwork/XBEkB3