Yeah, we probably should have explained those domes more in-depth, but The Crow had a short explanation of them :)
They appear over dense areas of foragable items (but only once you've spotted the items!), but if you look away for a moment they will be gone (as the limitation goes). P.S. they will also fade away visually and not be visible from close up or inside, due to rendering issues, so they might've still been there if you were simply standing too close.
I think perhaps the biggest change I'd make to them is give them a different colour, so they'd stand out better in the yellow forest. Thanks a lot for the feedback though! You're the first person to mention the sparkling domes so we're quite happy to actually hear someone noticed them at all :D
Thanks for playing our game!