我在建立LED面光源特性設(shè)置時(shí)遇到幾個(gè)名詞，請(qǐng)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(gè)事的嗎? BYKoel  
我也是剛學(xué),不過,先看了下,應(yīng)該還好明白的吧, R=Tqj,6  
哦,不過,我也沒有細(xì)看的, ^_ojR4  
只是看了下BSDF的定義拉, +7
8CvjG  
說的不對(duì),請(qǐng)多多見涼啊

如下是幫助里提供的定義 IG3,XW  
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. vS;1/->WD  
BSDF：Bi-directional Scattering Distribution Function and is a generic term which is used to refer to BRDF and BTDF. u0`%+:]0  
BTDF：Bi-directional Transmittance Distribution Function. It is the scattered radiance through a surface per unit incident Irradiance. hva2o`  
7#<c>~   
具體參數(shù)怎么選取需要自己去多嘗試，手冊(cè)里雖然有公式，但很抽象。

謝謝roadwu和shirley996，還不是很清楚，設(shè)置了幾個(gè)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(diǎn)圖片上來么，真的非常感謝了

仔細(xì)看看英文說明書吧，收獲不小的。