I’m going to look for a color like the reference image,

Gates of Paradise

work by Ghiberti

I tried to apply texture. This is the result. That’s okay, but not perfect. Here we can see the gold flowing through its frame.

I didn’t model the frame here yet. It may take a long time. I am thinking about a reasonable solution, in order to save time.

I’m thinking of the white part (frame) to apply some wood material and then colors.