I produced a questionnaire containing four images, from which the participants had to choose from. Three of these were photographs, and the other was a computer-generated image by Alex Roman. Participants were asked to pick one image out of the four that they believed to be computer-generated and to give any reasons for their choice.
Results showed that out of the people who participated, only thirty percent of them correctly chose photo D as the computer-generated image. The main reason given for choosing photo D was that there was some repetition used within the bookshelf. This is only really obvious when you take the time to look closely at the image. However, the fact that seventy percent of participants were fooled into picking A, B or C, suggests that computer-generated imagery can mimic realism very well. People who picked the wrong image gave reasons such as lack of detail and unrealistic light levels. From this, it is obvious to see that Alex Roman's image must have very accurate lighting and show a high level of detail.
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