--- In Avid-L2@yahoogroups.com, MarkB wrote:
"Maybe it's sort of like zooming into or boosting the brightness of a dark area of the picture; you're going to see blocks that were not visible before. Which is why it's better to shoot at 4k if you're going to manipulate the picture in post."
Actually, that is a sensor sensitivity or dynamic range issue, not resolution. So shooting 4k would just give smaller blocks, but they would still be blocks.
And the compression used to get 4K down to a manageable level will most likely increase these issues as the first step of compression is to throw away what it's presumed the human eye can't see.
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