Objects can be easily inserted into pictures with the Softprint tool. The problem arises though that objects get a white edge if they're copied from an empty page.
The source frame "LICHT" is at the side of the picture into which it is to be copied. The text gets a bright surround.
To copy objects into the picture with soft edges, simply overlay the object onto the picture and copy with no offset (source = target). If the fast Redraw mode is switched on, though the frame of the object being copied is overdrawn, it will be taken into account by Softprint during output. In this way you have control over how strongly the object is copied into the picture. When finished, you can simply delete the source frame.
Starting configuration
Result