Given the image (picture) aspect of this work, I ought to have mentioned Howard Oakley’s excellent series of articles using Storyspace and Tinderbox†. For instance, Tennyson, Pre-Raphaelites, and Storyspace: a rewarding combination. You can find more articles by Howard on using these apps in relation to art and writing at Storyspace and hypertext: index to articles (version 2) – The Eclectic Light Company.
Whilst, in general, I normally suggest not just adding images to Tinderbox notes just because you can this particular aspect—researching images and their content—reverses the logic. Here, the upside of having the images easily (visible) at hand may outweigh more general considerations about file size and export.
†. He was using, back in 2017‡, Storyspace v3 & Tinderbox v7 which by then used a common code base and UI design. IOW most things you may see being described in Storyspace can be done in Tinderbox except it doesn’t have Storyspace’s reader mode. In a post-Web world the latter might seem odd, but in the mid/late 80s there was no Web, so you tended to read a hypertext in the tool in which it was written! By comparison, Tinderbox (launched 2001) post-dates the Web (1990, public from 1993) and the app’s export was written with blogging in mind (thus ‘web’ export to HTML).
‡. To find out then-current version of Tinderbox in the past see Previous Versions To Current Baseline and for releases post the aTbRef baseline, see the Change Log. Both pages can be accessed from the ‘Respurces’ section at the bottom of the aTbref home page.