I think it would be great if we could adjust the opacity level for token auras, all the way from transparent to fully opaque. I am having issues in games that use Darkness spells (DND and Pathfinder especially) where the only way to create darkness effects that the players cannot see through is to use fog of war, but that gets really tedious and time consuming having to redraw the fog of war when the darkness effect moves, such as when a player casts Darkness on themselves. Adding the ability to set a token aura to fully opaque would allow us to create a Darkness type effect that would obscure vision of anything under the aura, and still leaving the dark area mobile when the token itself moves.