有大神帮忙嘛？

alsurface是要下载装上才能用的，具体去这个网站下载http:/去/http://www.anderslan掉glands.c中om/alshaders文/index.html#mtoa。
Installing into the MtoA deployment
Copy the contents of the bin folder to {MTOA_INSTALL}/shaders
Copy the contents of the ae folder to {MTOA_INSTALL}/scripts/mtoa/ui/ae
Creating a custom install location
Extract the package to an alShaders folder somewhere on your filesystem.
Set the ARNOLD_PLUGIN_PATH variable to include {ALSHADERS_INSTALL}/bin
Set the MTOA_TEMPLATES_PATH variable to include {ALSHADERS_INSTALL}/ae
Set the MAYA_CUSTOM_TEMPLATE_PATH variable to include {ALSHADERS_INSTALL}/aexml
具体方法是复制下载好的bin所有文件到arnold安装路径里的shaders
复制ae里所有文件到arnold安装路径scripts/mtoa/ui/ae
重新打开maya就能看到了，还有个换变量的方法两个选一个。

那是arnold 5.0版本里的材质

2022版就有的