I would use a normal map to fake the smoothness of a corner. I did a brick a while ago, it turned out ok. Just remember to give each face it's own smoothing group and for each smoothing group make it a separate UV island and you should be good.
Alright, so this is kind of a stupid question, but I was wondering what the best way to make a hard edge look not-as-hard would be? For example, say I have a single brick, a 6 sided rectangle. How would I make the edges look softer once it's all textured and whatnot? Would that be through the normal map? If so, how?…