I have created a project and added a dtm and some buildings. I then added georeferenced raster images ( one or multiple images - tried it several times) and configured them accordingly (Classification: aerial, Coordinate system: same as project). Images are processed but not displayed at all. If I turn off the surface still now images show up.
I then created a new project, just added the dtm and two raster files and then the files showed up. That's when I noticed that they are only displayed if i do not check the "clip to model extent" option. I then tried the same in my first project but to no avail.
basically - in one project the images show up, in the second one they don't. Both times it's the same data set.
ok, figured it out while re-creating my project. The reason why the images were not displayed in one project was that i had themed the surface and the theme overlayed the images and hence - nothing to see.