When you see an image, maybe at small scale on the web, what clues do you look for to tell if its a photo or a virtual image? On exteriors, I usually look for patterns in the concrete sidewalks or streets, or anything that is slightly out of line with perspective rules such as a tilted lightpole. Saw one today that I thought was an image until I looked at the fire hydrant which had its base flange a few inches above grade where it hadn't been backfilled yet. Another clue is stakes holding up newly planted trees. Don't think many of us would put those in a rendering, but maybe
. Any others?