these are sweet psd!
toon em out
also this helps me when sketching:
Always try to avoid resting your hand on areas already worked. Being right handed I try to work from left to right and top to bottom on my drawings. Whilst this is not always practical - using this principle as far as possible will help keep your drawing smudge free. On occasions however, resting on already worked areas is unavoidable. By using your second piece of paper as a rest for your hand however, you can get away with overworking previously drawn or shaded areas. Just ensure that once your 'rest' paper is laid on your work, you don't then, inadvertently drag it over the surface of your drawing. Lay it down, rest on it, lift it when necessary, then lay it down again, work on it again and so on - never drag it, as this can smudge any soft graphite applied underneath the paper, just as your hand would.
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