Drawing ... it is an interesting thing it is the act of breaking an object down into simple forms (circles, squares, ovoids elipses) finding the volumes locating the turning points etc and then setting them in relation to all the others that you have found and keeping a consistancy across your drawing / model. It requires that you extend your visual memory so that you can retain the form in your head as you turn from the model to the 'canvas' and back it requires that you gain an understanding of the things that you seek to draw / model to help with visual memory (it is very hard to remember that which you have no words to decribe ie any body ever tryed to draw / model a human back)
my point is .. I think, Whether you are using a pencil or a brush, a lump of clay or Maya ... the medium may be a skill in itself but the act is the same and requires mostly the same skill set excluding material diferences of course
..... Thats what I think ....