Depth-aware upsampling experiments (Part 2: Improving the Z-buffer downsampling)

In the previous post of these series, I tried to explain the nearest depth algorithm [1] that I used to improve Iago Toral‘s SSAO upscaling in the sponza demo of VKDF. Although the nearest depth was improving the ambient occlusion in higher resolutions the results were not very good, so I decided to try more quality improvements. In this post, I am going to talk about my first experiments on improving the Z-buffer downsampling.

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