It appears to be a UV mapping problem- or "issue". A number of my TransPond stuff, like Adobe Mission, shows the same thing. Some walls look fine, others have that "streak" look. I think this DS Alpha is showing the problems that can be addressed maybe before the first Beta is released. People who see this should file a Bug Report with DAZ- (but I kind of suspect they already know about it.) There are other things too, like seams that show up on models. Again- File a Bug Report just to be sure they are aware of it.