As for the checkers, just look online for stocks, put it as a screen layer mode for lighter, multiply if darker- just experiment :3 lock the layer or the stock layer as layer clip to stay on which area you want it
as for the brush, in sai it is called 'spread' again, you experiment with it :3 different sizes, density etc
as for the brush, in sai it is called 'spread' again, you experiment with it :3 different sizes, density etc
Thank you~!