How to put a background on a render
Step 1: colour your render a plain simple colour.
Step 2: Click the background you want and open it.
Step 3: Click select and then select all,and then click copy, now go to the background.
Step 4 click paste and then go to select and then click transparent selection and move your line art to the part of the background you want it positioned in.
Step 5: colour your lineart the colours you want it to be.
your done adding the background to your Line art.
render(c)me
BackGround(c)Universal