Here's your design with finishing effects, along with a few closeups for detail. Aside from the obvious metallic finish, shadows, etc., there are a couple of subtle effects in play. The palm tree's fronds are embossed, and cast shadows on each other. However, the tree only casts shadows on the belt, but not on the background landscape, which helps it blend into the landscape. The tartan has been distorted to follow the contours of a (rounded) belt, which adds realism. Also, there is added ornamentation on the two buckles.
The earlier mockup is posted at the bottom.