I hope I am not imagining things... but I vaguely remember reading something by someone, I believe here in FA, about a program they use to create rooms for use in their drawings. I don't think it was "Sketch Up"; the output I've seen with that program looks more like your regular CAD software.

Don't know why the name of Disney comes to mind... maybe because it is used by their animators? Somehow Zaush comes to mind as well -- he may have mentioned as using it for some of his images, or someone else did while reposting a pic by him. He seems to have left FA for Patreon (likely after all the controversy surrounding him) so not sure if any notes would be answered.

Anyway, if anyone has any idea what I'm talking about, links to said program will be much appreciated.