Making of Black Pearl Treasure by Domenico Selvarolo

Step 8 - I used modo UV tool (great tool) for all pieces - Here's an example with atlas projection.

Step 9 - I used only one hdr image for some tests with basic materials.

Step 10 - I used these maps and these setting to define the medallion materials. Bump map was used in the diffuse amount channel

Step 11 - For the plan I used this picture taken from google and then hand colored.