Simple Metallic Paint for mental ray

亦凉 2021-11-04 09:40 175阅读 0赞

在医院的时候闲着没事天天用笔记本看论文玩，翻到了一篇SIGGRAPH 2009的Poster名为《Reﬂection Model of Metallic Paints for Reﬂectance Acquisition》，由广岛城市大学（Hiroshima City University）的马场正志（Masashi Baba）和 浅田直树（Naoki Asada）所写。经过测试发现他们的模型要比mi\_metallic\_paint复杂一点点，而Flake层却又不同于mi\_car\_paint。这里的Flake层是用的高斯分布，也就是用样本去扰动第二高光。我直接在shader中采样高斯分布的CDF $\\frac\{1\}\{2\}\[1+erf(\\frac\{x-\\mu\}\{\\sgima\\sqrt\{2\}\})\]$的反函数获得样本。

When I was in hospital, I spent my on bed time by reading papers, and I found a SIGGRAPH 2009 poster named "Reﬂection Model of Metallic Paints for Reﬂectance Acquisition" which is written by Masashi Baba and Naoki Asada from Hiroshima City University. Their model is fast, simple, similar to the mi\_metallic\_paint, but the Flake model is different than mi\_car\_paint.

***Samples = 128, Sigma = 0.149, Mu = 0.001***

![Samples = 128, Sigma = 0.149, Mu = 0.001][Samples _ 128_ Sigma _ 0.149_ Mu _ 0.001]

***Samples = 128, Sigma = 0.249, Mu = 0.001***

***![Samples = 128, Sigma = 0.249, Mu = 0.001][Samples _ 128_ Sigma _ 0.249_ Mu _ 0.001]***

***Samples = 64, Sigma = 0.349, Mu = 0.001***

![64, 0.349, 0.001][64_ 0.349_ 0.001]

**Download from [Ortholab][]**

转载于:https://www.cnblogs.com/Jedimaster/archive/2011/04/21/2023257.html

[Samples _ 128_ Sigma _ 0.149_ Mu _ 0.001]: http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=ortholab&DownloadId=231091
[Samples _ 128_ Sigma _ 0.249_ Mu _ 0.001]: http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=ortholab&DownloadId=231092
[64_ 0.349_ 0.001]: http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=ortholab&DownloadId=231109
[Ortholab]: http://ortholab.codeplex.com/releases/view/64849