Abstract: According to the fact that feathers have approximately regular structures in fine scale，an approach is presented for realistic modeling and rendering of feathers based on high detailed geometry modeling and procedural bidirectional texture function sampling and blending with internal texture of feathers.The basic curve framework of the feather is constructed using Bezier or Hermite curves based on an analysis of the feather structure.On this basis，the fine geometric structure of the feather is further established using tubular curved solids and tessellated to obtained high detailed quadrangular mesh for rachis and barbs.Finally，the Bidirectional Texture Function（BTF） of the feather can then be procedural sampled on the quadrangular mesh which can be used to blending with the internal texture when rendering the realistic feather.