I want to create a brush similar to a fountain pen, with a three-dimensional feel to the strokes and a distinct tip. Alternatively, is it possible to achieve this by modifying the configuration parameters of a fountain pen brush?
Sounds like an interesting idea worth exploring. For information about configuring and adding your own custom tools to the PencilKit tool picker, see Configuring the PencilKit tool picker.
Sounds like an interesting idea worth exploring. For information about configuring and adding your own custom tools to the PencilKit tool picker, see Configuring the PencilKit tool picker.
If those APIs don't provide enough to get you the results you would like to achieve then we'd like to hear about that. If that is the case, please consider filing an enhancement request asking for the functionality you need to achieve your goals.
You can file an enhancement request using the Feedback Assistant. If you're not familiar with how to file enhancement requests, take a look at Bug Reporting: How and Why?