Masks?

[Zoja]

Hey, just wanted to ask what exactly are the masks for and the chanels in photoshop? I saw that valve always uses different masks on different heros but i cant find some useful infos on the web. People are often working with the chanels and changing things there, what do they improve?

Thanks^^

[HellJumper]

Check out this PDF provided by valve: http://media.steampowered.com/apps/dota2/workshop/Dota2ShaderMaskGuide.pdf