My understanding of the Desert Storm digital camo is that it works because they were doing a lot of city fighting. Camouflage works by breaking up your silhouette against the background. Since there aren’t really any straight edges in nature, they use rounded splotches for jungle warfare. Since there are a lot of straight edges in cities, they used straight edges for the splotches. If this camo was intended for jungle use, then it was probably a lot less effective than the traditional camouflage, which is probably why it didn’t replace the organic camouflage.