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ReLiShaft: realistic real-time light shaft generation taking sky illumination into account

Kolivand, H, Sunar, MS, Saba, T and Ali, H (2018) ReLiShaft: realistic real-time light shaft generation taking sky illumination into account. Multimedia Tools and Applications. ISSN 1380-7501

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Abstract

© 2018 The Author(s) Rendering atmospheric phenomena is known to have its basis in the fields of atmospheric optics and meteorology and is increasingly used in games and movies. Although many researchers have focused on generating and enhancing realistic light shafts, there is still room for improvement in terms of both qualification and quantification. In this paper, a new technique, called ReLiShaft, is presented to generate realistic light shafts for outdoor rendering. In the first step, a realistic light shaft with respect to the sun position and sky colour in any specific location, date and time is constructed in real-time. Then, Hemicube visibility-test radiosity is employed to reveal the effect of a generated sky colour on environments. Two different methods are considered for indoor and outdoor rendering, ray marching based on epipolar sampling for indoor environments, and filtering on regular epipolar of z-partitioning for outdoor environments. Shadow maps and shadow volumes are integrated to consider the computational costs. Through this technique, the light shaft colour is adjusted according to the sky colour in any specific location, date and time. The results show different light shaft colours in different times of day in real-time.

Item Type: Article
Uncontrolled Keywords: 0803 Computer Software, 0805 Distributed Computing, 0806 Information Systems, 0801 Artificial Intelligence And Image Processing
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Q Science > QA Mathematics > QA76 Computer software
Divisions: Computer Science
Publisher: Springer Verlag (Germany)
Date Deposited: 08 Oct 2018 11:05
Last Modified: 08 Oct 2018 12:20
DOI or Identification number: 10.1007/s11042-018-6296-7
URI: http://researchonline.ljmu.ac.uk/id/eprint/9437

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