I am sadly know very little of mapping myself, but I'm asking because I have a very talented mapping friend that thought that this might not be possible. Basically, I'm wondering if the attack/defend gamemode for maps like dustbowl, gravelpit, and gorge... can have the teams switched around so that Red will be the attacking team, and Blue will be defending. I'm not asking for those maps particularly, but could the gamemode in general be switched around when making a map? I would also like to ask... If this can be done, do you think it would be considered a major gameplay change if done in the artpass contest? He's afraid that Valve would not like him doing this, if it was possible.