The items of my resource pack are blurry and distorted (they are not meant to be). I have read this bug report before and the last comment (I couldn't comment on that bug; would have) read "...the block model format has changed recently, you have to adapt the resource pack to the current snapshot." I am unaware of how to do that. Posting this was my last resort.
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See MC-56987 for the links to the model format.