Hello matteosin,
If you need to get the orthomosaics for each block you can do the following:
- in Batch Process mode generate DEM for each duplicated chunk and export to the disk (you can use {chunklabel} macros in the export path filed in order to save the files under different names),
- then one by one do the following:
-- import DEM to the source chunk,
-- build orthomosaic,
-- export orthomosiac,
-- right-click on DEM in the chunk's contents and uncheck "set as default" option, do the same for the orthomosaic,
-- repeat import DEM and orthomosaic generation for each file.