Finally made it Stephen.
Graphic not quite up to usual standard. I have put most of the info in the graphic as easily printed.
In essence its a case of looking at all the surfaces and working out what lit them. This is a case of adding controlled reflections to bring out the shape. Be prepared to spend a bit of time as there will be a fair degree of experimentation. Adequate reward required for your assistant.
I have added your Mossie pic as it is easier to reference here rather than a gallery link.
Don