PSD File Importer Override

From Unity 2019.30f1 onwards, you can customize the PSD Importer to import files with the .psd extension. To do that you need to create custom scripts that call the AssetDatabaseExperimental.SetImporterOverride method.

Example SetImporterOverride scripts

PSDImporterOverride.cs

using UnityEngine;

namespace UnityEditor.U2D.PSD
{
    [ScriptedImporter(1, "psd", AutoSelect = false)]
    internal class PSDImporterOverride : PSDImporter
    {

        [MenuItem("Assets/2D Importer", false, 30)]
        [MenuItem("Assets/2D Importer/Change PSD File Importer", false, 30)]
        static void ChangeImporter()
        {
            foreach (var obj in Selection.objects)
            {
                var path = AssetDatabase.GetAssetPath(obj);
                var ext = System.IO.Path.GetExtension(path);
                if (ext == ".psd")
                {
                    var importer = AssetImporter.GetAtPath(path);
                    if (importer is PSDImporterOverride)
                    {
                        Debug.Log(string.Format("{0} is now imported with TextureImporter", path));
                        AssetDatabaseExperimental.ClearImporterOverride(path);
                    }
                    else
                    {
                        Debug.Log(string.Format("{0} is now imported with PSDImporter", path));
                        AssetDatabaseExperimental.SetImporterOverride<PSDImporterOverride>(path);
                    }
                }
            }
        }
    }
}

PSDImporterOverrideEditor.cs

namespace UnityEditor.U2D.PSD
{
    [CustomEditor(typeof(UnityEditor.U2D.PSD.PSDImporterOverride))]
    internal class PSDImporterOverrideEditor : PSDImporterEditor
    {
    }

}