It is not real 4K in any material way due to having a final master at 2K. Studios have upscaled the 2K image to 4K and retouched the content for your 4K UHD TV. You should see some visual improvement over a standard 1080p Blu-ray. Check the information below to see if the studios have upgraded the video with HDR or added immersive Dolby Atmos or DTS:X audio tracks.
Animation Rendered in 2K
Digital Intermediate at 2K
trolls 4K ultra hd
A troll princess and her companion, the one unhappy troll try to rescue her friends from being eaten by their nemeses.