Here´s some online resources and links I have collected over the years.
The links are Cinema 4D and general computer graphics stuff.
Architectural 3d objects for free
Cinema 4D general stuff
Free Simbiont Darktree shaders
C4D Download – Various Cinema 4D stuff: scenes, shaders, libs etc.
Thinking Particles (Maxon complete reference manual with example videos and files)
Car blueprints (clear blueprints of car models)
Free Stock photos
c4d cafe cinema 4d tutorials/
Lester Banks Cinema 4D tutorials
Various tutorials, Max, Maya, Cinema 4D
ZAP Håkan Andersson – Siggraph 2009 Masterclass
Hakan ‘Zap’ Andersson has been working as “Shader Wizard” at mental images since 2004 and is the author of numerous mental ray shaders, such as the subsurface/skin shaders, the car paint shader, as well as thearchitectural- and production shader libraries.
Mental Ray tips video series
Character modeling tutorials
Mathematical tutorials for Cinema 4D
CINEMA 4D & BODYPAINT TUTORIALS
3D Kiwi´s Bodypaint tutorials – commercial
Cinema 4D and game modeling tutorials by Psionic. (Old but still very useful.)
Cinema 4D plugins / plugin developers
Lumen, ZBlur, Cineview, Edgeshader and Enhance C4D.
White Lights. Giga shader etc.
Interposer, Greebler etc.
VRAY / VRAY FOR C4D tutorials
Vray for c4d official
Vray general / commercial site
Exterior training full 3D Max
Video and other useful online tools