# vkCmdCopyAccelerationStructureKHR(3) Manual Page

## Name

vkCmdCopyAccelerationStructureKHR - Copy an acceleration structure

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## C Specification

To copy an acceleration structure call:

    // Provided by VK_KHR_acceleration_structure
    void vkCmdCopyAccelerationStructureKHR(
        VkCommandBuffer                             commandBuffer,
        const VkCopyAccelerationStructureInfoKHR*   pInfo);

## Parameters

- `commandBuffer` is the command buffer into which the command will be recorded.

- `pInfo` is a pointer to a VkCopyAccelerationStructureInfoKHR structure defining the copy operation.

## Description

This command copies the `pInfo->src` acceleration structure to the `pInfo->dst` acceleration structure in the manner specified by `pInfo->mode`.

Accesses to `pInfo->src` and `pInfo->dst` must be synchronized with the `VK_PIPELINE_STAGE_2_ACCELERATION_STRUCTURE_COPY_BIT_KHR` pipeline stage or the `VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR` pipeline stage, and an access type of `VK_ACCESS_ACCELERATION_STRUCTURE_READ_BIT_KHR` or `VK_ACCESS_ACCELERATION_STRUCTURE_WRITE_BIT_KHR` as appropriate.

Valid Usage

- VUID-vkCmdCopyAccelerationStructureKHR-accelerationStructure-08925
  The `VkPhysicalDeviceAccelerationStructureFeaturesKHR`::`accelerationStructure` feature must be enabled

- VUID-vkCmdCopyAccelerationStructureKHR-buffer-03737
  The `buffer` used to create `pInfo->src` must be bound to device memory

- VUID-vkCmdCopyAccelerationStructureKHR-buffer-03738
  The `buffer` used to create `pInfo->dst` must be bound to device memory

Valid Usage (Implicit)

- VUID-vkCmdCopyAccelerationStructureKHR-commandBuffer-parameter
  `commandBuffer` must be a valid VkCommandBuffer handle

- VUID-vkCmdCopyAccelerationStructureKHR-pInfo-parameter
  `pInfo` must be a valid pointer to a valid VkCopyAccelerationStructureInfoKHR structure

- VUID-vkCmdCopyAccelerationStructureKHR-commandBuffer-recording
  `commandBuffer` must be in the recording state

- VUID-vkCmdCopyAccelerationStructureKHR-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support compute operations

- VUID-vkCmdCopyAccelerationStructureKHR-renderpass
  This command must only be called outside of a render pass instance

- VUID-vkCmdCopyAccelerationStructureKHR-videocoding
  This command must only be called outside of a video coding scope

Host Synchronization

- Host access to `commandBuffer` must be externally synchronized

- Host access to the `VkCommandPool` that `commandBuffer` was allocated from must be externally synchronized

Command Properties

Command Buffer Levels | Render Pass Scope | Video Coding Scope | Supported Queue Types | Command Type
--- | --- | --- | --- | ---
Primary Secondary | Outside | Outside | Compute | Action

## See Also

VK_KHR_acceleration_structure, VkCommandBuffer, VkCopyAccelerationStructureInfoKHR

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0