ZBrushCentral

Need Help ..... sculpting in light 3d relief on a flat surface in ZBrush

Hi,
I’ve used ZBrush before, so I’m familiar with it, but don’t use it very often. However… I need to get some advice on sculpting in 3d relief on a flat surface, like a coin.

I need some tips on sculpting designs which have slight 3d relief , but flat enough to be used to create coins.

Links to videos or tutorials would be very helpful, I can’t find many specifically related to the subject.

Help appreciated,
Thanks.