PackTextures() resultant texture completely black

Hey so I'm trying to create a spritesheet and it seems to work fine when I set the maximumAtlasSize arguement to a size where I know the final texture would not fit causing it to downsample. Other then setting that to something really large where I know that the final texture would fit, the sprite atlas shows up black but at the correct size.

I don't know what's going on

Here's some of the code:

static void GenerateSpriteSheet() { Object[] textureObjects = (Object[])Selection.GetFiltered(typeof(Texture2D), SelectionMode.DeepAssets); int textureCount = textureObjects.Length; if (textureCount <= 0) return;

 Texture2D[] textures = new Texture2D[textureCount];
 for (int i = 0; i < textureCount; ++i)
     textures[i] = (Texture2D)textureObjects[i];


 string newSpriteSheetPath = "Assets/Game Assets/Resources/Spritesheets/NewEntries/";


 // Texture
 Texture2D packedTexture = new Texture2D(1024, 1024, TextureFormat.ARGB32, true);
 Material newMaterial = new Material(Shader.Find("Transparent/Cutout/Diffuse"));

 Rect[] uvs = packedTexture.PackTextures(textures, 1, 1024);
 newMaterial.mainTexture = packedTexture; //set the main texture of the newMaterial as the new packed textures...
 packedTexture.Apply();
 EditorUtility.CompressTexture(packedTexture, TextureFormat.ARGB32);

 string fileName = newSpriteSheetPath + "NewSpriteSheet-Texture.png";
 byte[] bytes = packedTexture.EncodeToPNG();
 File.WriteAllBytes(fileName , bytes);
 AssetDatabase.ImportAsset(fileName );
 packedTexture= (Texture2D)AssetDatabase.LoadMainAssetAtPath(fileName );
 EditorUtility.SetDirty(packedTexture);    
 AssetDatabase.ImportAsset(fileName );

 AssetDatabase.CreateAsset(newMaterial, newSpriteSheetPath + "NewSpriteSheet-material.mat");
 AssetDatabase.SaveAssets();

}