In the Repoussé dialog you can manipulate the constraint (sub-path) using any of the Internal Constraints tools to either punch it out to make a hole or add separate extrusion parameters. You can also add constraints to an existing Repoussé object by drawing a selection or path and choosing either 3D>Repoussé>Create Constraints From Selection(s) or Selected Path(s). You can also use the Add(Selection) or Add(Path) buttons in the Internal Constraints section of the Repoussé dialog.
Adobe Photoshop CS5 Extended
By Zorana Gee