Originally Posted by
Nintendo Maniac 64
Just to confirm, we're not so OCD about image quality to bother combining the luma from the mobile WebP art assets with the chroma of the PC PNG art assets, correct?
To clarify, the mobile WebP art assets are encoded with 4:2:0 chroma sub-sampling and therefore have a luma (greyscale) resolution of 1280x960 but a chroma (color) resolution of 640x480. By contrast, the PC PNG art assets are encoded in full 4:4:4 chroma and therefore have a resolution of 800x600 for both the luma and chroma. This means to achieve the absolute best quality, you would take the chroma from the PNG, upscale it by 1.6x (perhaps via waifu2x), combine it with the luma from the WebP, and then save as a lossless format with 4:4:4 chroma.