>>26179Renders are just what you asked for, her alone with a transparent background, usually raster images in a .png format.
Vectorizing is where you use vector graphics to "redraw" a character, the difference being that no matter how large you make the image, it never loses its quality. So long as its in its .svg format.
Here's a raster image, try zooming in on it and see what happens.
http://design.ubuntu.com/wp-content/uploads/logo-ubuntu_st_no%C2%AE-orange-hex.pngHere's a vector image, try zooming in on it and see the difference.
http://design.ubuntu.com/wp-content/uploads/logo-ubuntu_st_no%C2%AE-orange-hex.svgHope this suffices for you, did it pretty quick in between a game of 100% Orange Juice.