The method and system for generating texture of a target object acquire first information about a surface geometry and second information about a constituent material of the target object, and third information about a kind of incident light falling on a surface of the target object, preferably, from respective databases, calculates a intensity distribution of scattered light on the target object and in an area surrounding the target object using Maxwell's equations based on the first, the second and the third information, and calculates a two-dimensional intensity distribution of the scattered light at a specified angle to the surface of the target object as generated texture of the target object using the thus calculated intensity distribution of the scattered light.