Cristiano G. Franco,  Marcelo Walter. 

We present a model for geometric modeling and rendering of individual feathers for computer graphics purposes.The model represents the feather structure with a collection of B'ezier curves strictly parameterized. This parametrization allows easy generation of the existent types of feather structures with biologically-motivated parameters. Once the feather structure is defined, the feathers can be rendered either in a non-photorealistic rendering style or using texture mapping to achieve a more natural look.

http://sibgrapi.sid.inpe.br/rep-/sid.inpe.br/banon/2002/10.24.10.53

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