VkBuildMicromapFlagBitsEXT(3)

# VkBuildMicromapFlagBitsEXT(3) Manual Page

## Name

VkBuildMicromapFlagBitsEXT - Bitmask specifying additional parameters for micromap builds

## C Specification

Bits which can be set in VkMicromapBuildInfoEXT::`flags` specifying additional parameters for micromap builds, are:

    // Provided by VK_EXT_opacity_micromap
    typedef enum VkBuildMicromapFlagBitsEXT {
        VK_BUILD_MICROMAP_PREFER_FAST_TRACE_BIT_EXT = 0x00000001,
        VK_BUILD_MICROMAP_PREFER_FAST_BUILD_BIT_EXT = 0x00000002,
        VK_BUILD_MICROMAP_ALLOW_COMPACTION_BIT_EXT = 0x00000004,
    } VkBuildMicromapFlagBitsEXT;

## Description

- VK_BUILD_MICROMAP_PREFER_FAST_TRACE_BIT_EXT specifies that the given micromap build should prioritize trace performance over build time.

- VK_BUILD_MICROMAP_PREFER_FAST_BUILD_BIT_EXT specifies that the given micromap build should prioritize build time over trace performance.

- VK_BUILD_MICROMAP_ALLOW_COMPACTION_BIT_EXT specifies that the micromap can act as the source for a copy micromap command with `mode` of VK_COPY_MICROMAP_MODE_COMPACT_EXT to produce a compacted micromap.

## See Also

VK_EXT_opacity_micromap, VkBuildMicromapFlagsEXT

## 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 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0