請高人幫忙解釋一下這幾個參數(shù)分別是干什么用的，有什么區(qū)別
)G&OX  
type : table ysPW<  
          fresnel ]f?LQCTq<b  
          stack 0}N^l=jQ  
          grating 4F?1,-X  
         anistropic o}z}79Z  
         coating DLL ?9A[;j|a0  
scatter model: ) |a5Qxz  
         ABg +/
tD$  
         Elliptical  ABg o
k'1  
        Elliptical  Gaussian =|/b[Gd(  
        Table BSDF lhU#