Unit 3.1
Further material/links:
An Expert’s Guide to Celebrity Faces
The way we process faces means that symmetry is only part of the story.
Yann Pineill: SYMMETRY – A Palyndromic Film
This film is a more artistic approach to mirror symmetry. The second half is strictly like the first, but played backwards and mirrored.
Unit 3.2
Unit 3.3
Unit 3.4
Solution of the Exercise of Unit 3.4
Unit 3.5
Unit 3.6
Further material/links:
Interactive PDF files
with embedded 3D designs for all of the 32 crystallographic point groups
Quiztallography, a game for Android phones.
It can be downloaded free of charge from the Android market (Google Play):
https://play.google.com/store/apps/details?id=aax.uab.quiztallography
The game is currently available in English, Catalan and Spanish.
Unit 3.7
Further material/links:
M.C. Escher
Welcome to mcescher.com, the official website published by the M.C. Escher Foundation and The M.C. Escher Company
Unit 3.8
Further material/links:
The Fascination of Crystals and Symmetry 