Mysterious Fungus Wasps Nest

Text on the meme

Large white fractal-brain-looking fungus about 7in across. Spotted inside the trunk of a fallen tree, Berkshire UK non-fungal I spotted this fantastic looking fungus while I was out on a walk yesterday, and I can't find an ID that matches it. I thought it might be sculpted puffball, but the pattern is different to the images I could find. Any ideas? Wasp nest Ah, that would explain the wasps!

What it means

A Reddit screenshot shows a strange white, brain-like growth inside a fallen tree, initially believed to be an unusual fungus. The punchline is that it is actually a wasp nest, making the mysterious appearance suddenly make sense; the final reply is used as an amused reaction to a mistaken identification. EN: A Reddit screenshot shows a strange white, brain-like growth inside a fallen tree, initially believed to be an unusual fungus. The punchline is that it is actually a wasp nest, making the mysterious appearance suddenly make sense; the final reply is used as an amused reaction to a mistaken identification.

Objects

white brain-like growth / белое мозгоподобное образование wasp nest / осиное гнездо fallen tree trunk / ствол упавшего дерева bark / кора wood / древесина forest setting / лесная местность Reddit screenshot / скриншот Reddit comment thread / ветка комментариев orange upvote arrow / оранжевая стрелка голосования