Cartoon Bias
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Cartoon lines are very dependent on “Bias”. Changing Bias will subtly change the line thickness and amount of detail. Different characters can benefit from having different Bias values. The “Bias” setting under the “Toon Render” item applies for every character. (Remember, turning “Override Lines” on will ignore these settings).
Traditional cartoon shading uses the “Cartoon” gradient, (this is default). The “Anime” gradient adds another color that depends on the light’s location.
The above images shows the bias set to 20 and 8. Notice how a bias value of 8 shows more detail in the toon lines then the bias value 20.