I have also seen specular strength and specular exponent maps. I wonder if those are going to be implemented eventually?
As for the brightness, I missed something obvious. Increasing brightness and removing white with the alpha channel or decreasing brightness and removing black with the alpha channel helps get rid of all that glare. I have some nice looking ice bricks and snow now.
I am guessing that not everything needs a normal map? Some things (like wood) seem to look weird with any normals.
LCDLC Mapmaking Dept.
Maps finished: Hellhouse, Sorry, Worrior 1-20
Maps modded: CubeOrigin
Maps in release candidate: Blockforts, Cannons 1, Hotzone, Icecastle
Maps in beta: Arctica, Cannons 2, Cerulean-River, Igloo, Skygarden, Spacestation
Maps in alpha: Merlin, Totem