hi recently i'm work on some large scale terrain shadow solution, and i found pssm and Sample Distribution Shadow Maps but the code of Sample Distribution Shadow Maps is totally dx11 and use deferred pipeline, i have's learn about dx11, can't read the code, and the pssm article's website is nolonger existed is any one know where i can find some article use pssm in dx9 , thanks.

http://http.developer.nvidia.com/GPUGems3/gpugems3_ch10.html discusses the algorithm and provides some guidance for split maps in DX9.

guy, thanks