Starship Asterisk*

Okay; I have done a cut and paste to remove the column and shadow. http://dl.dropbox.com/u/10566986/Chequerboard%20illusion%202.jpg I replaced the squares which were at least partly shadowed with copies of the two bottom right hand edge squares. There is a small amount of perspective distortion in t...

Ron; The "apparent" colour gradient along the connecting strip is an illusion itself! I have done the cut and paste trick to compare the squares without the rest of the image and they really are the same. And Rohan; I'm going to try editing out the green column and its shadow and see what ...

I tend to agree that terrestrial pictures are all very well but not here. As roll clouds go this one is fairly ordinary by comparison with those seen almost daily in the Northern Territory. See the image here:
http://en.wikipedia.org/wiki/File:Morni ... mPlane.jpg