Arnold插件 Alshader 2.0（仅cryptomatte）

arnold5.0后，alshader就大部分材质停止开发了，唯一就剩cryptomatte还在更新。关于cryptomatte的用途，就不细说了，网上都能搜到。

Beta 4 release notes: （经测试MtoA 3.0.0可用）

Bug fixes:

• Fixed crash with multiple Cryptomatte shaders in scene.
• Added error detection for issue where Cryptomatte filters do not get set up correctly, (reported by one user by not reproducible).

Beta 3 release notes:

Features

• Support Arnold 5.1 adaptive sampling
• Support for mixed bit-depth EXR files
• Support long object names (up to 2048 characters)
• Added preview_in_exr control
  • False (default): Omit preview channels when EXR drivers are being used
  • True: Keep behavior as usual
• Support C4DtoA Arnold 5.1 naming changes
• Add controls to disable various kinds of name processing
• Switched to Daniel Schmidt’s faster hash to float code

Bug fixes

• Crash when rendering with non-aov shaders in Arnold 5.1
• Skip disabled nodes in manifest

Beta 2 release notes:

Features

• Test suite for developers
• Added Cinema 4D name parsing (Sen Haerens)
• aov_shader metadata for KtoA and MtoA
• Unicode and special characters in names are now tested and supported

Bug fixes

• Restored Maya name in special cases (ns1:obj1|ns2:obj2)
• Fixed some crashes with malformed names, added tests for this
• Fixed metadata when rendering multiple Cryptomattes into one EXR file (Sen Haerens)
• Fixed metadata with multiple drivers if one driver did not support metadata (Sen Haerens)
• Fixed manifests in custom Cryptomattes
• Fixed manifests for standard cryptomattes with array (per poly) overrides
• Fixed special characters (quotes, slashes) in manifests
• Manifests no longer include list aggregate nodes (Sen Haerens)
• Fixed issue passing AtStrings to variadic arguments in gcc older than 4.8.x (Sachin Shrestha)
• Statically link the stdc++ lib (Sachin Shrestha)

下载地址 https://github.com/anderslanglands/alShaders2/releases

安装方法：

1、将安装包/bin里面的三个文件复制到 arnold安装目录/shaders里，2、将安装包/ae 里的cryptomatteTemplate.py文件复制到 arnold安装目录/scripts/mtoa/ui/ae里。 开maya，arnold渲染设置的aov里面就会看到三个cryptomatte通道。