“Progress in Expressive Image Synthesis”(MEIS2015), was held in Fukuoka, Japan, September 25–27, 2015. The aim of thesymposium was to provide a unique venue where various issues in computergraphics (CG) application fields could be discussed by mathematicians, CGresearchers, and practitioners. Through the previous symposiums MEIS2013 andMEIS2014, mathematicians as well as CG researchers have recognized that CG is aspecific and practical activity derived from mathematical theories. Issuesfound in CG broaden the field of mathematics and vice versa, and CG visualizesmathematical theories in an aesthetic manner. In this volume, the editors aim toprovoke interdisciplinary research projects through thepeer-reviewed papersand poster presentations at the this year’s symposium. This book capturesinteractions among mathematicians, CG researchers, and practitioners sharingimportant, state-of-the-art issues in graphics and visual perception. The bookis suitable for all CG researchers seeking open problem areas and especiallyfor those entering the field who have not yet selected a research direction.