Hi Lordfox,

> <...> maybe a dummy ther you can place an other 2D Pictureelement - png e.g. would
> be nice white or black = transparent/alpha - in the origin point. Like in sketchup :)

You could try using a background image for this, you can load one in using the View > Image commnad.

If you want transparent areas in the image, make sure the PNG image has alpha transparency in it.

- Michael