"Too Many Kooks Spoil the Brothel" wrote in message
oups.com...
Is this possible by selective bending of light-rays?

Yes. See last month's message on sci.math:
http://groups-beta.google.com/group/...6cdeaf24782d51
and
http://www.h33.dk/usynlig_index.en.html

Dirk Vdm