flavorgelatin
I'm planning to make a sort of diorama, and the 3D nature of it is going to require suspending things in clear gelatin.
Are there flavorings that would work that wouldn't significantly affect the color and opacity of the gelatin, or its setting strength?
Cornstarch can be a bit temperamental. You can weaken the strength if you cook it too long and it doesn’t do well if you reheat it. If you use a lot, it could weep. There is a much better alternative. ARROWROOT! (not to be used with dairy products) Arrowroot doesn’t cloud your gravy, doesn't alter the flavor like cornstarch can. For me, it's just a better thickener. I use it all the time in my pot-roast gravy that has tons of gelatin and a spot of vinegar. It doesn’t interfere with the silky texture you are seeking.
You might also want to use a higher quality gelatin, like the one used for gelatin art. See this one: https://gelatinartmarket.com/products/gelatin-powder-280?variant=1455952961
Best Answer
A lot of flavourings are clear to begin with. They are colored artificially to make them look "real". I brew beer and I have seen several alcohol-based extracts to use as flavouring that are clear. They are pretty concentrated and are not expensive. I have used a blueberry flavoured extract before that was clear. Surely you can find something online. If you are having trouble finding something, you might check a local homebrewing store or one on the internet.