G'day rwdesign.
Thanks for your submissions. I like them both. I think the shape can be improved as it looks more like a square at the bottom, therefore making it a pyramid, rather than a tetrahedron. I like what you've done with the shading in it. I prefer #42 to #32.
Tetrahedron is a shape where all four sides of the shape are triangles.
Thanks again and looking forward to seeing where we go.