I've now transferred the sketch for my Art of Painting picture and applied the imprimatura. I chose raw sienna for the colour, I wanted something yellowish and it is the most transparent of all colours and so ideal. I'm currently at the end of 1885 in van Gogh's diaries and his discussions about colour during that year have inspired me to limit my palette for this one. I'm thinking of using just lemon yellow and raw umber for the underpainting (or burnt umber, which seems to look better in a test I've done... but this colour has disappointed me time and time again with its ugliness compared to the lovely neutrality of raw umber). By day I'm doing sound effects for IndieSFX though and will be releasing a new set of car effects soon.