Rim lights

Rim light is used to highlight the edges of models. It separates them from the background to add more contrast.

In this image I used PostRimLightToon, which is an MME (MMD effect).

↑ Original video is here!

There’s a way to create this in Blender, you should check out this video.

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If you want to make anime style shader using Blender, you should get Goo Engine, which makes things easier.

You can get Goo Engine shader demo from here.