In this tutorial I will show you how to make a nice fading background with RMD tools.
Draw guides and mark out approximate colors.
Draw your first line
Move slider bar down, and draw another line right below the first one. I move the slider in increments of 10 or 15.
Repeat process until finished.
Gradient if increments were too large. Eye-drop the line below and using airbrush on pen 5 go over the above joint. Work all the way to the bottom.
Add the rest of your image. Your done! Image made in tutorial: [ LINK ]