Wait. Doesn't the PROTECT Act deal with this?

Prohibits computer-generated child pornography when "(B) such visual depiction is a computer image or computer-generated image that is, or appears virtually indistinguishable from that of a minor engaging in sexually explicit conduct"; (as amended by 1466A for Section 2256(8)(B) of title 18, United States Code).

Wouldn't this fall under that? I'm confused.