All that seems to be optical illusion may not always be. For example, a large number of atmospheric phenomenons produce optical effects that are troubling but not inducing brain errors and deceptions.
This is exactly what the English ATOptics.co.uk web site is dedicated to. You will find a large number of photos of many visual effects from our good old planet. Including very curious things.
I love the list of the subjects:
- Rays & Shadows
- Water Droplets
- Ice Halos
- High Atmosphere