Ok cool, glad I found this. Turning off Hardware Acceleration worked for me. 😀
Still though, the Blur Tool leaves something to be desired. Once you get to a certain point, you can't blur anymore. It would be nice if it had something like a "Spread" setting if that makes sense.
I hate comparing software but I feel I need to explain how I wish the Blur Tool worked in Affinity Photo. Try out the Blender Blur and Blender Basic presets in Krita. Or the Blend Tool in Clip Studio Paint. Or the Smudge/Blur Tool in Leonardo with Smudge set to 0 (it's works as a single tool). Or Grainy Water in Painter.
Interestingly, Affinity Photo's Blur Tool and Medibang Paint Pro's Blur Tool work the same except with one big difference. Repeated strokes with Medibang's Blur Tool WILL continue blur.
You can sorta create a blur/spread effect with Affinity Photo's Smudge Tool by using pressure with X/Y Scatter but it ends up sorta splotchy and imprecise.
Anyway, those are my thoughts because I don't like importing/exporting images between software for a single tool. If Affinity Photo's Blur Tool worked like any of the above, I could do all my work entirely in Affinity Photo.
