I've discovered that the interesting pictures were painted by Rob Gonsalves.
I have now placed these in their own section with other examples.
The Rob Gonsalves Collection
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Julian Beever's Street Art Illusions
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| Strange Poem Spell Checked Poem | Illusion
| Observation Test
| Illusion
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| Short Quiz
| Illusion
| Illusion
| Short Quiz
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| Illusion
| Illusion
| That's not right!
Upside-down cars being transported? | Illusion
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| Illusion
| Illusion
| Illusion
| Illusion
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| Illusion
| Illusion
| Illusion
Can you spot the Giraffe? | Observation Test
Can you spot all 11 faces? |