I have come to the conclusion that Manga Studio will not do shapes like I need it to. However I do really like the inking and painting, so I may end up buying the full version anyway. Here is a quick cat that I drew without penciling first. I only used one layer for the colour. Normally I have several layers: base colour, shadows, high-light, and rim-light. Instead I just used the oil paint tool and did all the colour mixing by hand.