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Are older 4K UHD Blu-rays simply upscaled versions, or are they truly rendered in 4K

not all 4K UHD Blu-rays are truly rendered in 4K. Some are upscaled versions of 2K or even 1080p content, while others are native 4K. The quality of the equipment, the speed being used, and the quality of the film stock can all affect the quality of the original master.

Some movies are shot with 4K UHD Blu-ray releases in mind, so they'll never need to be upscaled. However, others are filmed in 2K or 1080p and then upscaled to 4K. This can lead to a difference in quality between the two types of discs.

It's worth noting that some films are filmed in 4K but still get a 2K upscale due to the special effects being rendered in 2K. Additionally, 2K upscales can still look really good, and some movies, like Coco, are 2K upscales to 4K and look gorgeous.

It's also worth mentioning that regular Blu-rays don't have HDR, so if you want that feature, you'll need to go with a 4K UHD Blu-ray.

In summary, not all 4K UHD Blu-rays are truly rendered in 4K. Some are upscaled versions of lower resolution content, while others are native 4K. The quality of the equipment, the speed being used, and the quality of the film stock can all affect the quality of the original master.

Upscale any video of any resolution to 4K with AI. (Get started for free)