gotta love begginer sigs :D bring so much memories :D anyway yea bro... keep practicing and go throught tuts... belive me it will help u alot :D
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gotta love begginer sigs :D bring so much memories :D anyway yea bro... keep practicing and go throught tuts... belive me it will help u alot :D
Well like Aether said in the alien tut a render if downloaded and saved to your computer should have a transparent background.
The differences in the terminology are that a stock will always have a background and a render won't. You can either try cutting it out yourself which is the bane of my existance haha. But the magic eraser or magnetic lasso tool work well. Also and I think this gives the best result but probably takes the longest is to just make a really rough outline of the render with the normal lasso tool and then press Q to edit it in quick mask mode. This will make everything not in the selection red. You can then use a normal soft brush to paint the areas that you don't want. Then click Q again and you will have your revised selection.
Alternatively you can go to planet renders or premium renders and just make an account and download whatever you want. kiu.