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Stupid question: where does the illusion of 3D come from?

Started Jan 13, 2015 | Questions thread
OP Pritzl Senior Member • Posts: 1,477
Re: Stupid question: where does the illusion of 3D come from?

Thanks for the response. Just to make sure I have it straight: I get the 3D impression from that photo because:

  1. Narrow depth of field centred on the closest edge of the jellyfish's dome makes it look closer than the rest of the jellyfish's body.
  2. Colour contrast between the jellyfish and the background.
  3. Colour and light/shadow contrast within the jellyfish itself adds to its rounded appearance.
  4. I must be really sensitive to these factors to get this overwhelming perception of 3D from this particular image.

Sound about right?

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