We do tend to think that the camera is unbiased and that a photograph picture is true. The photo montage, uses mainly photographic material and is therefore able to fool people for a second that a cat can be as big an a dinosaur. That's part of the fun. When the montage goes digital anything goes. At least in my book. But my aim is usually not realism , the pictures just has to look good in some way or another. The cardinal in this montage is stolen from a painting by El Greco. Stealing is believing!