>>860
Arnold付属のmrShadersToArnold.py使うとか
https://docs.arnoldrenderer.com/display/A5AFMUG/Convert+Deprecated+Shaders
> This simple script converts unsupported materials (Phong, Blinn, mia_material, etc..) to an Ai Standard shader.

もしくはShaderMap Proでメタルネスワークフローのテクスチャに変換しちゃうとか
(aiStandardSurfaceはメタルネスベースと旧来のテクスチャの両対応)
https://shadermap.com/home/
> Use the Templates from the Start Menu to convert between metal / rough and specular / gloss workflows.