All that remains is to sift through my photographs of Black-Footed Rock Wallabies to find one that suits this scene. The photo that prompted this painting includes a wallaby, but I think there are better poses to choose from among my other photos.
As well as adding a wallaby, I'm sure I'll fiddle with the foreground just a little before I call it done. Whichever wallaby I choose, I know where it will be positioned and I've left the back wall of the cave a little lighter there to provide some latitude for fine tuning as a final step.
Cheers
Pete