I just trying around to find my way to sketch futuristic buildings and syklines.

Maybe it is a wrong approach, but i think it could be one way by
create a canvas, select a brush, "fix brush size"
zoom far out (the brush size dont shrink with zooming), sketch building silhouette,
zoom in (brush size dont grow with zooming), add some rough details,
zoom in (brush size dont grow with zooming), add some more details,
zoom in (brush size dont grow with zooming), add some fine details,
and so on...
just without touching brush size i must do now after zooming canvas.

Is there such an option, if not i would to like to see in the next version