VkMicromapUsageEXT(3)

# VkMicromapUsageEXT(3) Manual Page

## Name

VkMicromapUsageEXT - Structure specifying the usage information used to build a micromap

## C Specification

The `VkMicromapUsageEXT` structure is defined as:

    // Provided by VK_EXT_opacity_micromap
    typedef struct VkMicromapUsageEXT {
        uint32_t    count;
        uint32_t    subdivisionLevel;
        uint32_t    format;
    } VkMicromapUsageEXT;

## Members

- `count` is the number of triangles in the usage format defined by the `subdivisionLevel` and `format` below in the micromap

- `subdivisionLevel` is the subdivision level of this usage format

- `format` is the format of this usage format

## Description

The `format` is interpreted based on the `type` of the micromap using it.

## See Also

VK_EXT_opacity_micromap, VkAccelerationStructureTrianglesDisplacementMicromapNV, VkAccelerationStructureTrianglesOpacityMicromapEXT, VkMicromapBuildInfoEXT

## 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