Save your brush swatch as a PNG and select the highest quality.
Make sure your brush is black and keep the background transparent.
Create a document with your brush stroke isolated on it.
ABR brush loads as expected in Affinity, you can skip ahead to Step 8: Exporting the brush as an Affinity. This article will show you how to convert non-compatible Photoshop brushes for Affinity. ABR brushes are not compatible in Affinity. Things to know: Affinity Designer can open most ABR. You can also use this tutorial if you want to make a brand new raster brush and/ or just want to know how to make a brush in Affinity Designer. Are you looking to convert your brushes from Photoshop to Affinity Designer? Well look no further as this tutorial will talk you through the process, step by step.