This tutorial will show you my style of making portrait drawing (with mouse).
I used this image:[ LINK ] as my reference.
For first I made the background of drawing with airbrush tool.
After that I made few guidelines for guide layer to help me place eyes nose etc...
Here I added in some of the main colors of the picture using the "fill tool". You can hide the guidelines already or in the next step.
Here I added the skin color and some other main colors to the drawing(use lower opacity(20-40%) for best result.
Now I added in some details.
For nose, mouth and eyes I used zoom to be sure I dont mess up since I'm mouse user.
Here I added in secondary colors,details and shadowing. The most important thing is to use fill tool at very low opacity.
Final step! Add in small details and try to fix your mistakes.
For hair I used low opacity pen tool to add in some more detail.
And dont forget your signature :P
Finished drawing can be found here:[ LINK ]