well... i use manga studio 5 and photoshop for the post editing, the texture, if it is what i think mean by that, its a photoshop filter, i duplicate the layers one with soft noise and one with more heavy one
(noise is the name of the filter) then i delete parts of the hard one on places with more focus, im not sure if i did that on this painting but i do that normally.

for the post editing it is one layer, before that i normally had a sketch layer, then i make a blocking layer, this is just to block the sillouette, dosent matter the color, then with the blocking layer layed down i put the base colors in and merge it with the blocking layer, then another one on top for the shadows and again i merge it, sooo yeah its not one layer but i pretty much add something then merge it over and over again till i have all my colors layed down and i start rendering in one layer.

its one layer after a while but not from the start.

hope it helped!.

ps- if you need to ask for something else you can send a private message.

you dont need eyes.

its really just to add a bit of texture o3o but thanks :D

thanks god