I created a huge list of objects I wanted to be on the scene. First item of the list is the coins. I wanted to create a gold coin for this project.
After some 2D tweaks, I managed to create some Height Maps from these images (using Paint Shop Pro btw).
Modeling and UV process didn't took so long with Modo. You can see my coin modeling timelapse video below.
By using these height maps, I created a material with Substance Designer. Micro Details feature is amazing by the way. It reads your height map painting data and creates adjustible dirt on it. So I created an old looking gold material.
Finally I ran some physics simulation on Modo and rendered the coins with Octane Render. Result is not bad at all.