I'm sorry I didn't take a photo of the quilt after it was finished with the quilting as it was for a friend's friend. She didn't want the photos stitched on so all I could do is stitch around the photo as close as I could. These blocks were 6 inches too. I've stitched over embroidery designs in the past using the same color thread as the background. I'd been worried about doing it till someone told me the thread would disappear into the background. Of course this won't help you for your situation. Maybe stitch an outline around say the face of the person in the photos just to stitch it down or add some hash marks within the photo to tack it down but in areas it won't show up too much.