我在建立LED面光源特性設置時遇到幾個名詞，請問大家是什么意思？ BSDF BRDF BTDF，我該怎么處理這些數(shù)值呢？

怎么還是沒有人幫忙解答呢？希望大家多提寶貴意見...謝謝了...

咦,不是有一節(jié)就是專門說這個事的嗎? :]^e-p!z  
我也是剛學,不過,先看了下,應該還好明白的吧, %@/^UE:  
哦,不過,我也沒有細看的, }SN( ^3N  
只是看了下BSDF的定義拉, tMIYVHGy  
說的不對,請多多見涼啊

如下是幫助里提供的定義 p*Bty@CRi  
BRDF：Bi-directional Reflectance Distribution Function. It is the scattered radiance from a surface (reflective scattering) per unit incident Irradiance, and thus has units of inverse steradians (1/sr). The BRDF is defined as the differential scattered radiance per unit incident Irradiance. C_.9qo]DT7  
BSDF：Bi-directional Scattering Distribution Function and is a generic term which is used to refer to BRDF and BTDF. g,ZA\R~  
BTDF：Bi-directional Transmittance Distribution Function. It is the scattered radiance through a surface per unit incident Irradiance. ?9b9{c'an  
'Wonz<{'  
具體參數(shù)怎么選取需要自己去多嘗試，手冊里雖然有公式，但很抽象。

謝謝roadwu和shirley996，還不是很清楚，設置了幾個沒什么變化么？里面說到在TRACEPRO里面能量必須守恒，吸收，散射，透射，反射總和系數(shù)等于1？？？可以傳點圖片上來么，真的非常感謝了

仔細看看英文說明書吧，收獲不小的。