Cubik Studio

Edit mode: Element / Voxel / Mesh / Paint / Preview
Location: No Idea
Function name: Load Blueprint Model
Function icon: an Img?

Function action details:
It would add an additional view that renders a semitransparent image that can be selected in foreground.
With the ability to disable movement of the View.
That would make it simpler to create "blueprints" (don't know the proper English word for that) and use them for Moddeling.

You can now import PNG as billboard and so use them as guides (knowing you can also lock them)