Fix Texture2D saver in Mono and for non-readable textures

src/ExplorerCore.cs

@@ -16,7 +16,7 @@ namespace UnityExplorer
     public class ExplorerCore
     {
         public const string NAME = "UnityExplorer";
-        public const string VERSION = "3.1.2";
+        public const string VERSION = "3.1.3";
         public const string AUTHOR = "Sinai";
         public const string GUID = "com.sinai.unityexplorer";
         public const string EXPLORER_FOLDER = @"Mods\UnityExplorer";

src/Helpers/Texture2DHelpers.cs

@@ -15,6 +15,16 @@ namespace UnityExplorer.Helpers
         private static MethodInfo EncodeToPNGMethod => m_encodeToPNGMethod ?? GetEncodeToPNGMethod();
         private static MethodInfo m_encodeToPNGMethod;
 
+        public static byte[] EncodeToPNGSafe(this Texture2D tex)
+        {
+            var method = EncodeToPNGMethod;
+
+            if (method.IsStatic)
+                return (byte[])method.Invoke(null, new object[] { tex });
+            else
+                return (byte[])method.Invoke(tex, new object[0]);
+        }
+
         private static MethodInfo GetEncodeToPNGMethod()
         {
             if (ReflectionHelpers.GetTypeByName("UnityEngine.ImageConversion") is Type imageConversion)

src/Inspectors/Reflection/InstanceInspector.cs

@@ -272,7 +272,14 @@ namespace UnityExplorer.Inspectors.Reflection
                     if (File.Exists(path))
                         File.Delete(path);
 
-                    var data = tex.EncodeToPNG();
+                    if (!tex.IsReadable())
+                        tex = Texture2DHelpers.ForceReadTexture(tex);
+#if CPP
+                    byte[] data = tex.EncodeToPNG();
+#else
+                    byte[] data = tex.EncodeToPNGSafe();
+#endif
+
                     File.WriteAllBytes(path, data);
                 }
             });