Prompted by a support question today, I put together a brief demo on how to make custom hatched shapes with the MapBox iOS SDK. You could use this technique for on-the-fly shading of user-defined areas, all done in the client, potentially even when offline, for a very custom look to your app.
Watch this video to see how to extend the SDK to make it look just right for your app.
Have a question about how to use our SDK or an idea for an interesting feature? Feel free to reach out to us anytime.