Vulkan not support 16 bit index for mesh ?

Vulkan
1

I set for mesh VK_INDEX_TYPE_UINT16 (but this mesh have VK_INDEX_TYPE_UINT32 index !!! ) and get normal render this mesh
Then i set for this mesh VK_INDEX_TYPE_UINT32 and get normal render this mesh !

Question Vulkan ignored VK_INDEX_TYPE_UINT16 and VK_INDEX_TYPE_UINT32 and work only with 32 bit index ?

2

That’s a bug in the driver then. It should respect the indexType parameter in vkCmdBindIndexBuffer.

3

It would be nice to know which HW and driver version was it. You can report that to the driver vendor, or if you can implement a simple test showing the failure, you can contribute it to VulkanCTS project (https://github.com/KhronosGroup/Vulkan-CTS).