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drivers/metal/README.md

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+# Metal Rendering Device
+
+This document aims to describe the Metal rendering device implementation in Godot.
+
+## Future work / ideas
+
+* Use placement heaps
+* Explicit hazard tracking
+* [MetalFX] upscaling support?
+
+## Acknowledgments
+
+The Metal rendering owes a lot to the work of the [MoltenVK] project, which is a Vulkan implementation on top of Metal.
+In accordance with the Apache 2.0 license, the following copyright notices have been included where applicable:
+
+```
+/**************************************************************************/
+/*                                                                        */
+/* Portions of this code were derived from MoltenVK.                      */
+/*                                                                        */
+/* Copyright (c) 2015-2023 The Brenwill Workshop Ltd.                     */
+/* (http://www.brenwill.com)                                              */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/**************************************************************************/
+```
+
+[MoltenVK]: https://github.com/KhronosGroup/MoltenVK
+[MetalFX]: https://developer.apple.com/documentation/metalfx?language=objc