Wall Map Files

[AngryUser32x]

Does anyone know where the image files for the wall maps in Penumbra 1 & 2 are kept in the Steam game folders?

I've been trying to map the place out in 3-D for TinkerCAD; already done that for several other games - Amnesia, Soma, etc. I take map diagrams, turn them into svg files, and upload them. Screenshots don't quite work, because your view of the map isn't perfectly flat.

Anyone know where these things can be found? Thanks