PURPOSE: To provide a method for displaying the two-dimensional image of a three-dimensional object space normalized by an object data base in which a complicated light source can be modeled in a real time by using low cost image synthesizing hardware. CONSTITUTION: An 'object data base' OSJ normalizing the world of 3D to be displayed on a 2D display screen DIS is held by a 3D image synthesizing device. The object data base includes a light source LS having the disuniform distribution of illumination. More then one lookup tables 606 are preliminarily stored by the device for easily calculating the illumination of an object surface P0 . The lookup table 606 integrates dependency of the illumination on the distance by operating address designation by a polar coordinate (Θ, ϕ calculated for each picture element of an output image. Several tables indicating an illumination pattern at the spot of a different distance D from each light source can be stored for each light source. The smooth change can be attained by interpolation in between integral values of the polar coordinate Θ, ϕ and the distance D.
METHOD DRAWING TWO-DIMENSIONAL IMAGE OF THREE-DIMENSIONAL OBJECTIVE SPACE SPECIFIED BY OBJECTIVE DATABASE