[讨论]磨砂玻璃在tracepro里面怎么设置？ [复制链接]

斑主用的是哪个版本的ＴＰ啊？４..０以前版本的manual有没mentioned？

Solution: LpSd/_^b  
The plastic material with the rough diffusing surface can be modeled in TM$`J  
TracePro, but as two separate properties (select Define/EditPropertyData). ` _]tN  
3)qtz_,H/g  
MATERIAL PROPERTY {\-IAuM  
A TracePro Material Property can be created, and the index of refraction of 7o64|@'j  
the material is entered here, as well as an absorption coefficient if it is 3?DM AV  
known (this would be for absorption losses just from propogating through a Z9 tjo1X  
given thickness of a clear polished sample of the material, unrelated to the ,0[h`FN  
diffusing surface finish.  Entering zero for the absorption coefficient is TWgI-xB  
propobly a reasonable estimate for a transparent material. [a1}r=6~  
\9dC z;  
The Material Property is applied to the Object (Define/Apply Properties). ?QCHkhU  
:. a}pgh  
SURFACE PROPERTY gkNvvuQXc  
A TracePro Surface Property can specify 5 possible outcomes for light incident 4 5\%2un  
on a surface - Specular Transmission, Specular Reflection, Scattered 'B4j=K*  
Transmission (BTDF). Scattered Reflection (BRDF), and Absorption. DvvjIYB~  
|(a<b  
For your property, I expect that Specular Transmission, Specular Reflection, fmj-&6  
and Absorption would all be 0, leaving only Scattered Transmission (BTDF). ~4+=C\r  
Scattered Reflection (BRDF).  BTDF and BRDF are controlled by 3 coefficients - #N"K4@]{  
A, B, and g.  For an initial estimate, I would suggest entering BTDF(g) = mEe JK3D[  
BRDF(g) = 0, which defines a Lambertian dsitribution. n,NKJt  
iw^(3FcP@C  
The challenge is to determine the proper ratio of Transmittance vs |^E#cI  
Reflectance.  You can enter a value for BRDF(A) and then use the Solve For A?*_14&  
feature to solve for BTDF, and the editor will display the resulting i<nUp1r(  
Integrated BTDF and Integrated BRDF values.  You want these to sum to 1, and 3?GEXO&,E  
to have a ratio that matches the behavior of your surface.  If the ratio of T Af>Ho"
i  
vs R is dependent on the Incidence Angle, you can use the Add button in the
C/Dc1sj  
property to add Incidence ANgles to the table, and then define the BTDF and hE>i~:~R  
BRDF separately for each incidence angle.

建议使用第二种方法

楼上正解，tracepro自带有可用的散射模型，可以定性看看。 JYB<}
;,  
如果想与实际比较一致，得根据实测结果，编辑面特性文件，然后加载到面上。

看是看懂了 3!0Eh8ncI  
但是方法比较麻烦 ozbu|9+v  
一个一个得设置不同方向的系数 gNO<`9q  
更要命的是并不知道这种材料的 BTDF BRDF value ]3C&l+m$ot  
H|H!VPof]  
唉 我是懒人一个

新手學習中

333111111111111

要是实测怎么测呢

有时间也看看帮忙资料，不过先在论坛先了解一下软件大概的功能与使用流程

麻烦了``、看不懂````