Surface Pro 4 pen pressure and 3rd party brushes

  • Last night I downloaded some brushes from Gumroad and it doesn't seem to render much when using my Surface pen. I have to press down really hard to see any results, and even then it's very faint.

    However, when using a mouse, it seems to be working fine. It throws down a lot of ink.

    Since I am new to Clip Art Studio I am not sure what I should be expecting. Is it a Surface 4 Pen issue or is it an issue with 3rd party brushes? The pen seems to be okay with the brushes that came with Clip Art studio.

    Any help would be appreciated.