Stereogram http://www.mathematische-basteleien.de/stereogram.htm
How to make stereograms
julia.bmp) in grey colours and the coloured texture (marmor.bmp
Meintest du marmot?
How to make stereograms
julia.bmp) in grey colours and the coloured texture (marmor.bmp
Herstellung von Stereogrammen
(julia.bmp) in Grautönen und die farbige Textur (marmor.bmp