Hi @brai17,
The ObsResource now handles complex data (such as image files) via REST. This has been developed recently and the only examples that I can find are the unit tests covering the new feature.
You can either wire the files as Base64 encoded within the JSON requests/responses or alongside the JSON data as byte arrays (so raw files basically).
As a side note, VDUI is not yet 100% REST compliant, so you will have to wait a little before you can GET and POST images entirely through it via REST. But otherwise, it already provides web endpoints to save and fetch any files (including images of course). Making it entirely REST compliant is on its roadmap but work on it hasn’t started yet. However that could happen before October if it becomes part of Ref App 2.7.