these are cool - i want some more
I love this thread
Similar to the first one, one of my favourite optical illusions
A and B are the same colour
Focus on the missing bit, and a dark grey dot starts to appear...
Your brain adjusts for the shadow making A look lighter than it is and B darker.
You can try it yourself in paint
The bit you added looks like it gradually gets darker.
I just don't get it. I can clearly see where one square ends and the other starts, so why wouldn't they merge in?
Gah!
I haven't seen this one posted yet. These are 4 concentric circles.