Impossible(?) to toggle 2D mode when testing maps

Unless I'm missing something obvious, there's no simple solution to toggle 2D mode, which can make stages with a 2D transition quite difficult if you get stuck somewhere (especially if NOCLIP is also enabled) and need to return to 3D. Any assistance would be appreciated.

Uh, this isn't a bug. It's the map designer's job to properly make sure it's impossible to get stuck in their 2D mode transitions, and if you're using NOCLIP to cheat you really shouldn't be surprised that you can make situations unwinnable, as NOCLIP is really just a debugging tool, not something you should be using to actually play.

Now, having a debugging tool to toggle 2D mode might be useful, but that's a feature request, not a bug, and should be posted in the suggestions topic.

Thank you for the follow-up -- I've made a post in suggestions to that effect.