Decorative Stitching/Embossing on a Driving Bridle

[TomE]

Does anyone know what this style of decorative stitching is called and how it is done?  I'm interested in how they created the relief in the decorative design.  Any resources for learning this technique?  This example is from the Society of Master Saddlers national saddlery competition.  Thanks for looking.

[BlackDragon]

I believe it's known as trapunto-style leather stitching.

Basically it's similar to making a raised brow band but much more elaborate. You need a core made out of leather or cork, then you mold and glue your leather around the core, then stitch in place.