Nudity is an easy way to get attention and internet traffic to any particular website, blog, or forum. Many artists know this & use that fact to get more visitors & more "hits."

Some artists themselves, just like to make images that involve naked females, for whatever personally reason. It can obviously lead to atrracting viewers, interested in that sort of subject matter, to come over & look at their pictures. That also diverts more attention their way, also generating more "hits" in the process.

Good artwork, whether it's done in 2D or 3D, pretty much speaks for itself. People interested in these images, will go & admire them, anyway. It doesn't always have to involve nudity or big boobs to be appreciated ( though personally, I do like both :thumbupboth: ) .