VK_SHADER_UNUSED_KHR is a special shader index used to indicate that a
ray generation, miss, or callable shader member is not used.
#define VK_SHADER_UNUSED_KHR (~0U)
or the equivalent
#define VK_SHADER_UNUSED_NV VK_SHADER_UNUSED_KHR
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.