I am making a 2D game and need somebody who can help create a bunch of 2D artwork for me. I am incapable of doing it myself. I cannot afford to pay, however if and when the game sells, I will remember the people who have helped me. I know it is not much, but it is all I can offer. I need 2D artwork of all kind, backgrounds sprites probably icons items all sorts of stuff, add me on steam if you are interested. my names yourking77 there also. I think I am the only one that goes by that name but just to be sure look for the profile picture of bender wearing a crown.
You may also try to ask for that inside the OpenGameArt forums. Maybe you might explain a little bit more what kind of design you need, show some kind of prototype graphism and explain how is your game. (I'm not an artist i can't help you with that).
Starting artist could try it and use the opportunity to build a portfolio. I will try to ask my friends who are good in digital arts.
Depends on what type of art you want, I do all the art for my game, but that's pixel art. Do you want realism or a certain style like futuristic?
There's a subforum for finding people to collaborate with you: https://forum.unity.com/forums/non-commercial-collaboration.17/