In an image display method used in a game device to display a fluid which
is virtually caused along a three-dimensional surface, the
three-dimensional surface is mapped onto a flat plane on which a flow of
the fluid is calculated to obtain calculation results. The calculation
results are remapped onto the three-dimensional surface. A flame is moved
along the three-dimensional surface together with the flow of the fluid
and flame colors are also changed in consideration of a density of the
fluid.
