This is a very basic test application that uses the available OpenGL & Vulkan interop extensions to render some parts of a scene using OpenGL, and render other parts of the scene using Vulkan.
An OpenGL Framebuffer-Object and a Vulkan Framebuffer/RenderPass are using shared color- & depth-stencil texture attachments (so there is no per-frame texture-blitting or memory-copying involved)
Both APIs always render directly into the shared color- & depth-stencil textures.
Also both APIs are using the typical depth-buffer z-write/z-test provided by the GPU.
Synchronization between the OpenGL and Vulkan APIs is performed using shared device-queue semaphores.

Used extensions:

• GL_EXT_external_objects (GL_EXT_memory_object, GL_EXT_semaphore)
  • GL_EXT_external_objects_win32
  • GL_EXT_external_objects_fd
• VK_KHR_external_memory
  • VK_KHR_external_memory_win32
  • VK_KHR_external_memory_fd
• VK_KHR_external_semaphore
  • VK_KHR_external_semaphore_win32
  • VK_KHR_external_semaphore_fd

• NVidia
  • ✔️ MSAA OFF
  • ✔️ MSAA ON
• AMD
  • ✔️ MSAA OFF
  • ❌ MSAA ON ... driver crashes/freezes
• Intel
  • TBD

It looks like the AMD driver crashes/freezes in the glWaitSemaphoreEXT() or glSignalSemaphoreEXT() calls in vk-render.cpp

with MSAA enabled:
vkgl-test OR vkgl-test -msaa

with MSAA disabled:
vkgl-test -no-msaa

.\vcpkg\bootstrap-vcpkg.bat
OR
./vcpkg/bootstrap-vcpkg.sh

cmake . -Bbuild

cmake --build build

cmake --open build