I was thinking that some sort of False-creative mode could be useful to make building plans, so we make the building we want using holographic-like blocks which aren't physically present and only visible during that mode and possibly save this plan on a client-side library for later use or even share it.
What I like about this is, we actually "build" the desired building but as if it was in the character's mind and later on once we have the resources to actually build it physically we just place the appropriate blocks in the holographic blocks and they disappear.
What do you think ?
