duck

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEditor;

public class MyModelPostprocessor : AssetPostprocessor
{
    void OnPostprocessTexture(Texture2D obj)
    {
        string path = AssetDatabase.GetAssetPath(obj);
        TextureImporter textureImporter = (TextureImporter)AssetImporter.GetAtPath(path);
        textureImporter.maxTextureSize = 512;
        Debug.Log("Applied custom texture settings to: " + path);
    }
}