With VK_AMD_mixed_attachment_samples, we would be able to get full depth resolution for our checkerboard rendering. We can then use that full-res depth to better inform our checkerboard resolve.
There are outstanding questions about how it interacts with VK_EXT_sample_locations. Using these two extensions together would be required, since the default 4X MSAA sample locations are not suitable for use with checkerboarding.
With VK_AMD_mixed_attachment_samples, we would be able to get full depth resolution for our checkerboard rendering. We can then use that full-res depth to better inform our checkerboard resolve.
There are outstanding questions about how it interacts with VK_EXT_sample_locations. Using these two extensions together would be required, since the default 4X MSAA sample locations are not suitable for use with checkerboarding.