I can texture paint in Blender just fine, but the "soften" brush doesn't work as expected in the Viewport, it just blurs the color in an extremely subtle way. Meanwhile, when I use the "soften" brush in the UV editor, it blurs out the color nicely.
I've looked into this a little bit, and apparently there's a setting that is exclusive to the UV editor called "kernel radius", under Advanced brush settings. It's set to "2" in the UV editor, and reducing the radius to "1" produces a similar effect to the Viewport version of the "soften" brush, which is very subtle.
Phew, I hope that made sense. Since there's no option to increase "kernel radius" in the Viewport, I'm wondering how I can make the "soften" brush actually soften/blur the color out efficiently, without having to paint on the UV editor without X mirror. Thanks in advance!