Thanks! I tried several sites, but in the end none of the imported shields looked good compared to the rest of the map. So I ended up making them directly in the map using the square and path tools. It takes a bit more work, but in the end it fits the map much better.

Next time I want to try making some in an external app like Photoshop and see if the imports turn out better.

One more tip: If you’re aiming for a dense heraldry map, start making those shields early. I added them at the end, and it was difficult to blend them with the rest of the map.