I can't find a detailed description of "chunks". Are this bits that one puts together when making a detailed object (in parts -say a church with sculptures on it -doing each sculpture separately), and/or with photos from different perspectives (say from a top view, then a chunk form a side view)? I am new to this software, but I have used 123 Catch quite a bit. Also is using Photoshop to mask a good idea? ...How Do I import it then?