It might not be a puffball, Amanitas often look similar before their universal veil breaks and I know of at least one Amanita with a yellow veil (Amanita augusta).
this post was submitted on 17 Oct 2025
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This would be one hell of an amanita! This guy is 12 inch across. It turned more yellow over time, I think this is just a vibrant process of spores being formed in the tissue. It was very interesting to watch.
Ah the scale wasn't obvious to me, that's really interesting.