Why are some of my RAW files pixelated in certain areas?

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RJDG14 Forum Member • Posts: 93
Why are some of my RAW files pixelated in certain areas?
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I've noticed on some of the most in focus RAW (.CR2) files shot with my Canon EOS 4000D can be pixelated looking in areas, and this is particularly noticeable with diagonal object borders. Below is an example of what I mean (converted to PNG rather than JPG to avoid lossy artifacts):

As you can see, the border of this roof has an almost 2x2 pixel pattern if you look carefully. At the same time, this part of the same photo doesn't look at all pixelated:

Is this due to the Bayer interpolation that nearly all digital cameras use, and the camera software's algorithm simply struggling to convert certain patterns such as diagonal edges well, possibly due to different colours clashing? The problem does not seem to be present on slightly out of focus images, and is not present across the entirety of an image.

Canon EOS 4000D
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