Ice/Snow map

Hello, i’m trying out building an Ice/Snow Map, so a world mainly of coldness. When I was painting snow and ice it is so bright. (see screenshot)

I presume it will be this bright if I load it in the game, is there anything i can do in the dev kit to make it a lot less bright?

Or you can just do like WC did and add what I assume is a post process effect to lessen the brightness.

Thanks for the tips guys, I look in to doing something with it.