Hi, you want to use the png image as brush itself or as texture? What do you mean with transparent? I would import the png as image on my canvas and the go to the brush settings, search for form and click import. Then klick on the importet image and you should see the image as a brush. Is it that what you want or something else? There is a tutorial for this of course: https://www.sketchbook.com/help/knowledge-base/how-to-customize-brushes/
