Texture2DPNGExporter for MetaTex

Texture2DPNGExporter.cs

using UnityEngine;
using UnityEditor;
using System.IO;

public class Texture2DPNGExporter : MonoBehaviour
{
    [MenuItem("Assets/Export Selected Textures to PNG")]
    public static void SaveTexturesToPNG()
    {
        foreach (Object selectedObject in Selection.objects)
        {
            Texture2D texture = selectedObject as Texture2D;
            if (texture != null)
            {
                string filePath = EditorUtility.SaveFilePanel("Save Texture as PNG", "", texture.name + ".png", "png");
                if (string.IsNullOrEmpty(filePath))
                {
                    Debug.LogError("File path is empty for texture: " + texture.name);
                    continue;
                }

                SaveTextureToPNG(texture, filePath);
            }
        }
    }

    private static void SaveTextureToPNG(Texture2D texture, string filePath)
    {
        RenderTexture renderTex = RenderTexture.GetTemporary(
                        texture.width,
                        texture.height,
                        0,
                        RenderTextureFormat.Default,
                        RenderTextureReadWrite.Linear);

        Graphics.Blit(texture, renderTex);

        RenderTexture previous = RenderTexture.active;
        RenderTexture.active = renderTex;

        Texture2D newTexture = new Texture2D(texture.width, texture.height);
        newTexture.ReadPixels(new Rect(0, 0, renderTex.width, renderTex.height), 0, 0);
        newTexture.Apply();

        RenderTexture.active = previous;
        RenderTexture.ReleaseTemporary(renderTex);

        byte[] pngData = newTexture.EncodeToPNG();
        if (pngData != null)
        {
            File.WriteAllBytes(filePath, pngData);
            Debug.Log("Texture saved as PNG: " + filePath);
        }
    }
}