Incredible sharpness. Jagged lines are completely eliminated, and background paintings can look like high-resolution art prints.
Nickelodeon only created HD masters by cropping the 4:3 image to 16:9, losing roughly 30% of the original frame (cutting off heads, feet, and visual gags). The fan remaster respects the original cinematography. atla remastered in 1080p link
This is not an official Nickelodeon release. Instead, it is a comprehensive fan-driven restoration of Avatar: The Last Airbender (2005–2008). The goal was to preserve the original 4:3 aspect ratio and hand-drawn animation while upscaling the standard-definition source material to true 1080p HD. The project fixes numerous visual issues present in all official DVD and streaming versions, including PAL speed-up, ghosting, aliasing, incorrect colors, and compression artifacts. Incredible sharpness