# MTL4RenderEncoderOptions Custom render pass options you specify at encoder creation time. ``` struct MTL4RenderEncoderOptions ``` ## Overview Use these options to implement parallel encoding of render passes across multiple CPU threads by providing these values to the `options` parameter of [`makeRenderCommandEncoder(descriptor:options:)`](/documentation/Metal/MTL4CommandBuffer/makeRenderCommandEncoder(descriptor:options:)) and observing these requirements: 1. Commit all command encoders together in an array you provide to [`commit:count:`](/documentation/Metal/MTL4CommandQueue/commit:count:) or [`commit:count:options:`](/documentation/Metal/MTL4CommandQueue/commit:count:options:) 2. The first command buffer in the array contains a render pass that you start with option [`suspending`](/documentation/Metal/MTL4RenderEncoderOptions/suspending) 3. The last command buffer in the array contains the same render pass that you start with option [`resuming`](/documentation/Metal/MTL4RenderEncoderOptions/resuming) 4. All intermediate command buffers between the first and last in the array contain the same render pass that you start with both [`resuming`](/documentation/Metal/MTL4RenderEncoderOptions/resuming) and [`suspending`](/documentation/Metal/MTL4RenderEncoderOptions/suspending) options. 5. The sequence of render passes, in submission order, doesn’t intermix with compute, blit, acceleration structure or machine learning encoding. 6. A command buffer shouldn’t contain a render pass that you start with option [`suspending`](/documentation/Metal/MTL4RenderEncoderOptions/suspending) if it already contains a render pass that you start with option [`resuming`](/documentation/Metal/MTL4RenderEncoderOptions/resuming). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)