Yep, the galleries are open to anyone :)

I'll give you some tips for posting in the gallery seeing you've never done it before.

Make sure you read this link:

http://www.renderosity.com/news.php?viewStory=13472

You can post nude images in the gallery, but the smaller thumbnail pictures cannot have nudity  of any kind in the thumbnail images.  That means when you make a thumbnail image you cannot have any of the following showing:  male or female genitals, no pubic hair, no naked butt cheeks  period,  including those that are wearing thong undies, no exposed female nipples or the breast areola surrounding them.  See through clothing that shows any of those parts is considered "nudity".

Careful of using Aiko in the gallery if you are doing erotic or nude or semi nude or provocatively dressed and/or posed figures.  Aiko tends to look very young in the face (depending on the morphs and textures used).  There is a no child nudity rule here, so if the character "looks" under age to the staff (even if the character has a very adult looking body but the face looks under age),  the image is removed and they talk to you about it.  I always tell people that if they are wanting to use Aiko in the gallery in "adult" type situations, then they should consider passing the image by a Moderator first to get their approval before they upload it to the gallery.

You need to upload 2 images each time you upload to your gallery. One image is the actual large image you are submitting for people to see. The other is a small image that contains a portion of your larger image to be used as a thumbnail on the main pages of the gallery. 

While the Renderosity server will automatically generate a  thumbnail size image for you by shrinking down your big image, it can't tell the difference between an image that has nudity or violence in it and one that doesn't. It will shrink down any image you upload if you allow it to autogenerate a thumbnail.  That wasn't a problem before the new thumbnail policy about no nudity in the thumbnails, but it's caused problems for many members who do post nudes in their gallery and depended on Renderosity to generate the thumbnail for them. Soooo....

I suggest you get used to making your own thumbnails each time because that will save you from accidently submitting nudity in a thumbnail and having your image pulled from the gallery.

For the image galleries, the maximum sizes are 4096x4096 / 512 KB   [524288bytes]
Thumbnails: 200x200 / 15 KB   [15360bytes]

Pick the right gallery to post it in. If the image has a "Poser" figure in it, regardless of what program you used to finish it up and render it, the image can go in the "Poser" gallery.  Then pick the theme  IE: portrait, people, etc.

Don't forget to pick a content advisory option before submitting your image: None, Nudity, Violence or Both.  You can get into trouble  for not having the appropriate content advisory marked, and you can get into trouble if you just pick one "just in case" when the image doesn't need one.  If you aren't sure whether your image needs an advisory on it, ask a Moderator.

Finally, when you are ready, upload it to the gallery.  Never pick "Preview" because for some reason when you preview the image it counts it as an upload so you won't be able to upload the image if you have "previewed" it because that will have used up your one upload per day quota  Always just upload it and then if you need to make changes to something  click "Edit" below the image.

Finally,  have fun!

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi