I’ve considered making/using stylized drawings like that in the app but if the user adds their own entries or entries are added remotely they most likely will use a photo and they don’t mix well aesthetically. For now I’ll stick to the contoured photos. Most of them are decent quality and I managed to find/take one for all the current entries.
Also ZINC has customizable themes and I’m affraid they wouldn’t pop on some backgrounds whereas photos always do.