Please find a model of the UNSW Kensington Campus.
I've edited it so it just shows the lower areas of the campus around our sites for EXP2 and EXP3. This is so it will run faster on your machines in Lumion.
Download from here.
After I imported it into Lumion I noticed that some of the ground planes in the model were flickering ... this is because they aligned exactly with the grass plane in Lumion. So I lifted the model up a little bit (0.4m) which stopped them overlapping and the flickering stopped.