This is an island for the game (Earth 2124). Earth 2124 Its a spaceship fighting game. Small spaceship fighters will navigate around my models and will fighting with each other. One side is human and another side is alien. This work is 16 Bit HDR Radiosity Normal Mapping. I usually use the same method for all of my realtime project. Radiosity Normal Mapping is a method that have been used in Half-Life®2 / Valve Source™Shading. In Radiosity Normal Mapping, we transform our basis into tangent space and compute light values for each vector. Therefore we will have 3 Directional lightmap.
http://www2.ati.com/developer/gdc/D3DTutorial10_Half-Life2_Shading.pdf
Turtle render engine for maya support Radiosity Normal Mapping. With turtle for maya we can bake and see radiosity normal map directly in maya plus other stuff.
http://www.illuminatelabs.com/turtle/technical-specifications
I build the hlsl shader for Quest3d with ShaderFX. Also normal map should be world space instead of tangent space. Its possible to do the conversion inside maya. Also you can combine world space normal map with directional occ to have a self shadow for your texture. Plants are movieng in the wind. I find this cool shader in Quest3d forum.

Related links
http://forum.quest3d.com/index.php?topic=63520.0
http://www.lumonix.biz/yabb/YaBB.pl?num=1191220107
http://www.gamedev.net/community/forums/topic.asp?topic_id=470296