Dedicated transfer queue for copying buffers

[Pacheco95]

If you like a challenge, then you can still try to use a different queue family specifically for transfer operations. It will require you to make the following modifications to your program

I took the challenge, but I don't know if I did it correctly. Can someone help me check it out?

https://github.com/Pacheco95/khronos-vulkan-tutorial-cpp/commit/3588e5e8c96dbb5279f5bce9bceacc3763822e6a