Wrinkles exist extensively in the reality. For scattering characteristics of the target, wrinkle is one of the
main factors related close to the accuracy. So it is essential to analyze the influence of the wrinkled surface on
scattering characteristics. This paper generates the wrinkle geometrical model of the surface. The irregularity and
randomicity could be approximated and depicted by gauss distribution function. Using auto-correlation function of
the points on wrinkle makes the gauss random number correlative and generates wrinkle mesh. Then generate the
wrinkle geometrical model of the sphere by attaching the wrinkle face to geometrical model of sphere. Using this
wrinkle model, analyze the differences between wrinkled sphere and smooth sphere on visible light scattering
A new arithmetic is put forward for calculating the scattering of complicated rough surface, which based on ray-tracing with BRDF. When the direction of the incident ray is fixed, the direction of the reflected ray is decided by rejection/acceptance sampling, and the standard of rejection/acceptance sampling is based on the BRDF of the surface. The reflected rays well reflect the scattering character of the complicated rough surface when there are a great lot of incident rays. Integrating the BRDF of targets into traditional ray-tracing, it could calculate the scattering of complicated surface. The test result proves the practicability of the method.