cg
https://en.wikibooks.org/wiki/Cg_Programming/Unity/Transparent_Textures
unity
http://docs.unity3d.com/Manual/SL-SetTexture.html
cg
https://en.wikibooks.org/wiki/Cg_Programming/Unity/Transparent_Textures
unity
http://docs.unity3d.com/Manual/SL-SetTexture.html