I have implemented a simple Dynamic Lighting feature for working with light and shadow. Now Left-clicking on a statue turns off all world lights except for a lamp attached to each sculpture. Artists can grab this lamp and move it aound, allowing them to light the figure as they choose.
For the moment I'm going to leave this feature here as it's functional and I've other features I'd like to work on. However I might return to this feature at some stage and add controls to change the lamp intensity or colour if people think that would be useful. It may also be useful for artists to be able to add multiple lamps in order to create key or three point lighting setups.