Yes, you can. It is in the paper he handed out in class in more detail!
yes you can just do the usual command for it.
Make sure however that the image you want to use is saved in the same folder as your .nlogo or .nlogo3d file!
^ this is a key part.
I think he demonstrated it in the class using the cat picture! The codes might be in the S drive.
Yes, you can also use GIMP to edit the photo, make the photo have a smooth edge in 3d as the professor demonstrates in class.