Abstract
In 2D animation and comics, the thickness of object outlines and contour lines are often varied to emphasize or exaggerate the shape of the object. Adding a 2D touch to 3DCG animation using toon-rendering is common, but existing techniques can not achieve varying line thickness. This paper proposes a method of recreating the effect of varying outline and contour line thickness based on object shape in real-time 3D environments, such as video games. Our method focuses on exaggerating thickness of lines where the target polygon is curved. Furthermore, by using an backface polygon of the target polygon, we are able to create a continuous outline of the object, thus recreating a closed outline of object with varying line thickness.
