SVG Profile Quick TipS
The SVG Node can be used to create a profile shape then applied to a Gradient Dynamic or any node the supports a profile shape such as Bevel or Shape Extrude. Often the Curve Node is used which is viable majority of the time. However, the Curve Node UI can feel clunky sometimes and lacks some features that the SVG UI does offer. Such as zooming in/out allowing a lot more precision placing and moving anchor points. I discovered this while creating my Chess Set Substance. You can also import custom SVG Files created in external programs. SVG is not required for this method to work, you can create a profile shape by any means you see fit.
Please let me know if you have any questions or feedback!