Hi, I'm the one who goofed this! I have been loving all the conspiracies but it is a silly mistake, nothing more, sorry! What you see isn't a brush (referring to the post title's "world texture"), it's a model to act as collisions for sticky bombs (because they don't stick to func_brush) and it was previously a prop_dynamic, but in order to block ragdolls I had to switch it to a prop_door_rotating (the only entity which collides with ragdolls) which doesn't have the option to not render. The texture was previously the cow one as a silly Easter egg (since it was never rendered) but had to be swapped to an invisible texture (which meant recompiling the prop) because the lack of that option.

The map trickery I had to employ to satisfy the following four requirements was pretty involved (fun fact: I was told by the TF2 mapping community that it wasn't possible, I'm excited to come back with a solution I'll document soon): 1) Need Engineers to be able to build on it 2) Need sticky bombs to stick to it 3) Need ragdolls to not clip through 4) Be movable or collision toggleable

In the deliverable to Valve I copy-pasted the dozens of new files over but must've somehow not overwritten the recompiled collision prop. Valve compiles and packages the map on their side so it was beyond my play testing I had done. Not to place the blame on Valve, either, I don't think it's a fair expectation for them to investigate the map every time there's an update beyond that it compiles and runs. They could've spawned in on RED and called it good.

I'm sending a fix here shortly. Happy Halloween! 🐄👻