As of now, when using an image instead of a DWG, it's impossible to make the background visible behind a surface with false color enabled.

It would be useful to have this option because seeing the light outside the surface on the road is necessary to see how much of a nuisance it can be for outside the surface we need to light up.

The solution I use for now is to edit 2 images, one with a surface restricted on the area I want to work on and another one with a large surface showing all the light, as in this picture :

On the second image, it would be great to have the image still visible, even if it's by a transparency of the black areas.

Best Regards

Manuel