Since the "List of Appraisal Report Forms" includes the 1025 and the requirements below are for those appraisal report forms my guess would be that a complete set of interior photos is required for each unit.
At a minimum, the report must include photographs of the following:
main living area;
examples of physical deterioration, if present; and
examples of recent updates, such as restoration, remodeling, and renovation, if present.
Note: Interior photographs on proposed or under construction properties may be taken by the appraiser at the time of the inspection for the Certification of Completion, and provided with the Form 1004D.