Abstract
In order to create a landscape with trees by computer graphics, a technique with which we can reproduce various trees such as real trees adapting various growing environment is required. In this research, a complicated photoenvironment surrounding the trees is reproduced by making an environmental model. Thereby it is possible to make various shapes of trees which adapt to their growth environments by considering photoenvironments. In addition, the shade avoidance response, which is one of the properties of trees, is added to this tree growth model. Thereby the tree model can reproduce changes in tree shapes, when the tree is hidden by other trees.
