I'd say the real question is why would anyone want to render pictures of 1/2 naked children, be it alien or human?

1. What defines an alien as being underage.  Human years or alien years?

2. The term underage apply to aliens or only humans?  

3. The term underage being used for an alien is strange, to me that's like saying what's an underage ET considered to be.  ET was butt naked through the entire movie and still to this day I have never heard anyone question the age of ET.  If ET was "underage" then does that make everyone that saw it sickos?  If ET was an adult then what was it doing playing around with a 10 year old kid?

4. Kid movies like Planet 51 features child aliens without pants on. Cartoons have been using characters without pants for ages. Clothing was only added to help distinguish between male and female. What's the difference between Minnie Mouse and Mickey mouse? The clothing.

5. What makes an alien nude?  Look at the picture below. Is it nude because it has clothing in some areas and no clothing in others.

6. If some made a child version of the same alien (below) standing next to these two, do you instantly think underage child made by a sicko?

Now don't get me wrong on where I stand when it comes to depicting children, but Aliens aren't children and they don't represent anything that is considered a human, or anything that exists in real life. Like many others I don't have a problem with Renderosities TOS, I just wanted to point out that the "underage alien" issue isn't so black and white with a clear line separating the two.  How old are the aliens in the picture?  When dealing with pictures of children we are talking about an image that actually represents a real child or the generalization of a child.  I could say that the alien in the picture are both 7 years old or 300 years old and any age would be correct according to how I tell the story.