For all users who are interested in a Luxus PDF manual, here it is. Thanks to Spheric Labs for his permission.
This unofficial manual based on the development/documentation blog, you can find here including some related downloads:
You can download the manual itself here (comic style):
https://carraracafe.com/downloads/
Update: 2013, December, 14
– Tip added: Alpha and Transparency (by Spheric Labs)
by Holly and rk.
Woot thanks!