The lighting in portions of Grymforge is exactly what I'm trying to say with this post. It should be able to be seen and maneuvered about without tons of player trouble, but no beams of glaring sunlight streaming down everywhere. The owlbear cave, hag's lair, spider lair, etc. No sunshine. Dim lighting at most.
And yeah, no torches in places where no one who needs torches lives.
