Your drawing can only be as good as your photo
When selecting your photo for your commission drawing, please bear in mind that I can only draw what I can see. Therefore your digital image needs to be of a good size, have good lighting and be in focus. Also it needs to be the complete picture, i.e. no missing limbs such as arms or the top of the head.
All portraits are drawn onto a plain white background. If you want me to 'lose' other items from the drawing, this isn't normally a problem.