It's Sven, from myApertureLabs, Anti-Gabe'N'Missing Information, and the Team Fortress 2 Wiki.
took me a while to recognise which chamber it was, but now i see it, i have to say, well done! i guess the orange part had a texture in the original game you have yet to replace?
Yeah, those are developer textures.
You are not logged in, your comment will be anonymous unless you join the community today (totally free - or sign in with your social account on the right) which we encourage all contributors to do.
2000 characters limit; HTML formatting and smileys are not supported - text only