A lot of users are asking for help with problems in their scans, without showing their source photos. To me this is a bit like saying "I made this drawing and it doesn't look good, please help me" ... without showing the actual drawing.
If we can't see your source photos, often we can only make an educated guess to the cause of your problem. With an example of a source photo we can see much more easily what is causing the problem, and how you can improve your results.
So if you are having problems in Photoscan please upload at least a single source photo at full resolution.