3d box based grid

[Gemy-c]

When using 3d box, we get custom vanishing points which will be basis for
all the drawing. it would be nice if there was some grids based on this
vanishing points having lines begining from those points and going in any
directions.
This could easily be done with stars (see example)

This is also usefull to draw extra shapes (for ex the top orange rectangle
in the example)

This could be set as a single click option in the doc prefs (with a button
like "get grids from VPts")

[vonHalenbach (lustik)]

good idea. Thank you Cedric!

[Maximilian Albert (cilix)]

In the current development version it is now possible to convert a 3D box into a collection of guidelines that are aligned along its edges (simply select the box in Selector or 3D box tool and press Shift+G, or chose "Object->Object to guides"). It's not yet a true grid but might be of some use nonetheless.