Example-Based Microfacet Synthesis for Appearance Modeling of Thin Transparent Materials

Refractions through thin transparent materials are common in everyday life.Massive data must be captured in order to obtain high quality rendering results with existing modeling methods.We present a new technique that adds additional processing to the captured data, and reduce capture task.We place a camera at a fixed position, and apply microfacet synthesis onto the captured dataset.For the partial normal distribution function (NDF) data at each surface point, we complete the NDF data with partial NDF with similar shapes but different orientations from other surface points.Once we have the complete NDF data, we compute the bidirectional transmission distribution function.Experimental results show the method permits both high quality rendering result and efficient data capture.