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Using Paint Shop Pro (Part 4)
Shading by itself can be done just as in the coloring stage by using the draw tool, but we might want to make the colors smooth or less transparent, thereby creating a smoother color gradient. For this task, we will need to make use of the retouch tool. It has many powerful tools within itself, but we only require the smudge tool. This tool can be used to smooth out your colors or to completely reshape the colored outline by setting the opacity and hardness values appropriately (I used opacity = 10 to 30 and hardness = 100, but play around with the numbers to see what you like best; also, adjust the size and shape of the tool).
When you select the appropriate values, click on a color and drag along any direction, you will see a trail of that color following the mouse. ...