Yeah. I suspect adding a continuous texture as shown here may be beyond them but that's kind of where I ended up. As I'm a solo founder, a bit overwhelmed also doing
app UI redesign/extension
coding the whole thing
marketing it, including writing articles
ramp-up connections for attending Social Media Marketing World in San Diego on the 1st Mar.
But, this really niggles at me so I want to have a go.
I'll keep updating this thread if I make any progress.
Looking at Lottie animation, it seems from this forum post that it may not be possible.
The most hopeful is the 2D engine in Rive, formerly Flare from 2Dimensions, as seen in this article.