The images of "HEAVY OBJECT" feature good sharpness. Artifacts include chroma shift, chroma overflow (slight) and banding (in some scenes). Correspondingly, we fixed chroma shift and overflow, debanded the dark areas and applied slight anti-aliasing (considering there are a lot of 3-D scenes).
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Comparison (right click on the image and open it in a new tab to see the full-size one) SourceEncode