AssetPostprocessor.OnPreprocessAnimation()

説明

Add this function to a subclass to get a notification just before animation from a model (.fbx, .mb file etc.) is imported.

これによりインポート設定をコードにより制御できます。

using UnityEngine;
using UnityEditor;

public class Example : AssetPostprocessor
{
    void OnPreprocessAnimation()
    {
        ModelImporter modelImporter = assetImporter as ModelImporter;
        modelImporter.clipAnimations = modelImporter.defaultClipAnimations;
    }
}