Hi Uwe Zahn
Try this workflow:
go to the ALIGNMENT ribbon and find SELECT ALL ( cameras ), with that you select all existing cameras, then use the METADATA (XMP) tool and export XMPs with settings in the screenshot
004.png
RC will export the XMP metadata next to images with all the camera parameters ( position, orientation, scale ) that are LOCKED.
When it finishes the export ( few seconds ), restart RC and load the same scene again…
The next step is to load the additional images in the particular scene and you need to ALIGN them. The XMPs will keep the same position of the cameras and scene…
Once the ALIGNMENT is finished, you can try to import the model ( and check if it is imported to the same position ) and use texturing… and voila - it should be solved…