This is a standard feature working i.e. in airtable, smartsuite etc. The possibility to lookup pictures / files from another record does not seem to be configurable when using noloco db.
There are multiple use cases where this feature would be needed. An example would be if you wanted to set and display a picture / file on the main record level and linked “child” records and you would like to change the picture / file for all related records by just changing the one on the top level record to always have the latest available on all records.
Even more as I remember that it is not natively possible within noloco to copy attachments from a main record to new child records (when creating “children” from a “parent” record).
While it is possible to achieve this using third party automation tools, the lookup feature cannot be worked around and is desperately needed. This would be needed ideally for attachments in general - pictures and all other files.