地形　座学
Virtual Terrain Project
http://www.vterrain.org/
Hierarchical Image Caching for Accelerated Walkthroughs of Complex Environments
http://grail.cs.washington.edu/projects/hic/
libnoise example: Complex planetary surface
http://libnoise.sourceforge.net/examples/complexplanet/index.html

視界　遮蔽　座学
Harmless Algorithms - Issue 01 - Fine Occlusion Culling Algorithms
http://www.flipcode.com/archives/Harmless_Algorithms-Issue_01_Fine_Occlusion_Culling_Algorithms.shtml
Harmless Algorithms - Issue 02 - Scene Traversal Algorithms
http://www.flipcode.com/archives/Harmless_Algorithms-Issue_02_Scene_Traversal_Algorithms.shtml
Harmless Algorithms - Issue 03 - Design Patterns And 3D Gaming
http://www.flipcode.com/archives/Harmless_Algorithms-Issue_03_Design_Patterns_And_3D_Gaming.shtml
Harmless Algorithms - Issue 04 - A Hybrid Approach to Visibility
http://www.flipcode.com/archives/Harmless_Algorithms-Issue_04_A_Hybrid_Approach_to_Visibility.shtml
# Unified Occlusion Culling: Portals, Visibility Umbra, and HZB
http://www.andyc.org/articles/viewarticle.php?id=7
Hierarchical Techniques for Visibility Computations
http://www.cgg.cvut.cz/members/bittner/publications/diss_talk.pdf
Virtuals occluders
http://www.cs.ucy.ac.cy/~yiorgos/publications/virtual_occluders00.pdf

まとめサイト
Game Engines
http://gpwiki.org/index.php/Game_Engines
Libraries
http://gpwiki.org/index.php/Libraries