Hello, I am a long time user of Photoshop and also purchased Affinity Photo and Designer. My original intention was to replace photoshop but I'll show you a big dealbreaker for me that still keeps me on photoshop for digital painting. Simply put, the alpha of a single brush stroke should not MIX with itself. It should instead REPLACE what ever alpha has already been painted during that stroke. Best way to describe this annoyance is in the screenshot i've prepared below where i tried to replicate a standard hard brush in affinity Photo as best i can and do the same brush stroke in PS and Affinity Photo. As you can see, the alpha of the brush stroke is mixed instead of replaced which creates these undesirable dark edges lines.... This appears to be hard coded into the engine...