This is an example of my work. It's not entirely finished, but the general shape and textures are there. I've included individual (800x1000) renders along with this comparison.
Program: Blender 2.8 + Gimp 2.8
Triangles: 448 (a bit high but the topology speaks volumes)
4k -
https://i.imgur.com/lDqazE3.jpg512 -
https://i.imgur.com/TvXEcr4.jpg256 -
https://i.imgur.com/ZCgwjzM.jpg