Art-directed watercolor stylization of 3D animations in real-time

MNPR

“…We adapted the watercolor stylization of Montesdeoca et al [2017aMontesdeoca et al [ , 2016Montesdeoca et al [ , 2017b while developing our framework, but we needed other styles in order to evaluate it. Therefore, we implemented the oil stylization of Semmo et al [2015 (without color quantization) and invited an inexperienced computer science undergraduate student to develop and implement a charcoal stylization as part of a final year project.…”

Edge- and substrate-based effects for watercolor stylization

“…Otherwise (case 2 in Equation 2), substrate granulation happens, darkening the color C by the accumulated density d a . This effect has been thoroughly studied before [Bousseau et al 2006;Lei and Chang 2005;Luft and Deussen 2006a;Montesdeoca et al 2017], so we can adapt the substrate data and application parameter to take advantage of this characteristic effect. First, we convert the application parameter into a local granulation density d д = |a| +d min with d min = 0.2 the default amount of granulation.…”

“…This modulation is performed to increase the density only at the valleys of the paper and adapting our substrate data to follow the approach of Montesdeoca et al [2017]. The final pigment density accumulation d a is therefore given by Equation 4, where D is a global density parameter affecting the entire image:…”

“…In addition to the watercolor effects proposed and presented in this paper, we have also integrated the effects of pigment density, color bleeding, hand-tremors and substrate distortion to augment the watercolor look. These were incorporated from previous approaches by [Bousseau et al 2006;Montesdeoca et al 2017]. The entire rendering pipeline is presented in Figure 10 and was implemented using the direct stylization framework developed in Autodesk Maya by Montesdeoca et al [2017].…”

“…These were incorporated from previous approaches by [Bousseau et al 2006;Montesdeoca et al 2017]. The entire rendering pipeline is presented in Figure 10 and was implemented using the direct stylization framework developed in Autodesk Maya by Montesdeoca et al [2017]. The implementation was substantially extended and is briefly described next.…”