Week 6 Session 6 and for this session we started studying shading and grey scaling. The idea is that in a list from 0-100 all tones of grey fall within it (0 being white and 100 being black) and that when shading you use these numbers to achieve the accurate tone. 
Here I have an example provided to us by Steve for this session of a 2 point-perspective drawing of cubes and we had to shade them using this grey scale technique.
I made a list of the variety of tones using the grey swatches available in Photoshop going up in interval of 5 from 0 to 100.
These are my results, the top cube has been shaded 20 in the grey scale in Photoshop on the top face. To shade the face of the cube that has the least amount of light on it we choose the grey scale value between 20 and 100 - 60, then the face of the cube not directly in light but is illuminated by it has a grey scale between the value on the top face and back face - in this case between 20 and 60 so 40. And finally the shadow is always set to grey scale 50. I repeated this practise with the second cube below but with odd numbers to make it a little different.
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