How To Make Photoshop Painting BrushesA guide to making smooth painting brushes and painting effects using your own custom made brushes and smudge tool.How To Make Photoshop Painting Brushes by DraconianRain
First open the Brush panel/Brush editor. If you don't know, it's the icon that looks like paint and pens in a container or go to window and enable brush.
When it's open either turn on or off shape dinamics. This makes the ends pressure sensitive from thin to thick. I like to toggle it on and off when I paint or make double brushes, one with and one with out and save it to my collection. Then turn spacing all the way to zero. You'll notice that the brush goes from spotty messy to super smooth. This is also what you can do to make a flawlessly smooth inking brush in photoshop.
Tick Transfer, this will make it very sensitve opacity wise. Kind of like paint tool SAI's marker tool. With the spacing set to zero you can really see how smooth it is now. But if you like the spacing how it is then of course leave it how it is on default. With smoo