Not applicable.
Not applicable.
Not applicable.
As the method is called, it always leaves these records in the rendering log and also in the final output folder in the log file:
Fill Image path: X images in template detected
Fill Image: image = PATH, height ration = X, width ration = Y
In case the assembly was added to a live Studio Project and the rendering of a Design fails, please make sure the .pf file contains the job_doc_action node with correct filename, class and method:

The job_doc_action node in the .pf file