LEVEL DESIGN

Hourences' Tutorials
Advanced Pathing (UT2004)
Map Flow
 
MAYA

Saka's Pipe tutorial
UV Mapping in Maya
Learning Maya
TEXTURING

Texturing Metal
Evil Lari's HFX tutorials
Good Tutorials
Dregs' tutorials

MAP INSPIRATION

Ralph McQuarrie
Feng Zhu
Concept Art
Edward Burtynsky