咦,不是有一节就是专门说这个事的吗? RcM0VbR"EU 我也是刚学,不过,先看了下,应该还好明白的吧, wXGFq3` 哦,不过,我也没有细看的, t -(7Q8( 只是看了下BSDF的定义拉, W}_}<rlF 说的不对,请多多见凉啊
roadwu
2005-09-09 18:10
如下是帮助里提供的定义 SfF R 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. uWj-tzu BSDF：Bi-directional Scattering Distribution Function and is a generic term which is used to refer to BRDF and BTDF. H&IP>8Dk BTDF：Bi-directional Transmittance Distribution Function. It is the scattered radiance through a surface per unit incident Irradiance. 2^ M+s\p :|N bk58 具体参数怎么选取需要自己去多尝试，手册里虽然有公式，但很抽象。