>The picture on a TV or monitor with your head turned 90
>degrees doesn't appear as clear as it normally does. Is this
>the eye, the way the screen lines are scanned or a bit of
>both ? An example of the IC pin effect ?


Try looking at a TV (or any picture) upside down.
I at least find that picture information is greatly reduced when the brain's
pattern matching mechanism is thus confused.
I suspect (B,IMBW) that the TV affect you mention is due to this.

RM

PS - thanks for the superb optical illusion (1st of the 2)
I've never seen anything so good.