i use 3d and 2d modeling softwares in university and at work, and i would die for a layer system such in Autocad, Rhino or even Photoshop, it would be extremely quick to select different part of your machine, plus you could just make invisible the layers you don't need while you're building (i know that building tools provides you with an invisibility button but it's crap compared to what a good layer system could do, and i'd like it to be a vanilla feature), anyone feels the same way that i do?

