They do more than just buy renders. Game Renders' credits enable members to do certain things, such as buy items from the marketplace. Its like a pc currency if you will. Thats what they are mainly for. Just look into it, you will be amazed at what you may find.
I wish it was based on how long your posts are. It would make sense. Some guy could have an essay-type of post and get only 2 creds. Does that seem fair?
When you find a render you like... download it onto your pc and remember the guy who rendered them... give him credits when you finish using the render in your sig, and to be even nicer show him what work you'v edone ^_^
If they say... example: this sig is 10 creds you click donate credits on the left (under your name, bottom of the thing) then you type their name, the amout of creds, and a message if you want one. It sends it to them, then they send you the .PSD
read http://www.gamerenders.com/forum/index.php?showtopic=5137 I just added this part What to spend it on? you can donate to people -to render/cutout an image -for making you a graphic -for sharing info -for helping you out or buy items from the Shop (click here)