VkMicromapUsageKHR(3)

# VkMicromapUsageKHR(3) Manual Page

## Name

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

## C Specification

The `VkMicromapUsageKHR` structure is defined as:

    // Provided by VK_KHR_opacity_micromap
    typedef struct VkMicromapUsageKHR {
        uint32_t                      count;
        uint32_t                      subdivisionLevel;
        VkOpacityMicromapFormatKHR    format;
    } VkMicromapUsageKHR;

## 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.

Valid Usage (Implicit)

- VUID-VkMicromapUsageKHR-format-parameter
  `format` must be a valid VkOpacityMicromapFormatKHR value

## See Also

VK_KHR_opacity_micromap, VkAccelerationStructureGeometryMicromapDataKHR, VkOpacityMicromapFormatKHR

## 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