Study on Outdoor Soft Shadow Generation Method for Mobile Devices

Abstract

This paper proposes the method of soft shadow generation by extending the shadow volume to generate outdoor 3DCG images. In our method, two parameters, “brightness of shadow” and “soft shadow range”, are introduced to enable various soft shadows in different time zones. This algorithm aims to mount our method onto portable devices, so that the shadow texture for a soft shadow is generated and a soft shadow can be generated with the processing that does not depend on hardware specifications.