I'm just gonna leave this quote here, from Del Toro's Cabinet of Curiosity:
"A custom made box holds stereoscopic photographs of the maquettes from the as-yet-unmade At the Mountains of Madness, a memento of eight months intense artistic development and preproduction planning. The original sculptures are far too large for the Rain Room. 'I'll need a whole Lovecraft room- which I'll build if we make the movie,' says Guillermo."
That... is awesome.