I was hoping for something like this. One of the things I wanted to include was hidden piles of sand that need to be dug up.
Sadly, I can't find the sand pile objects, nor are their any 'dig' interactions in GM mode (unless I'm being blind). Still, having hidden sand piles that are just containers would also work nicely.
If toggling the object to be displayed gave that same kind of sheen/glow animation in the single player, that would be useful.
