Guangfeng Ji Han-Wei Shen Jinzhu Gao Interactive Exploration of Remote Isosurfaces with Point-Based Non-Photorealistic Rendering. 25-32 2008 PacificVis http://dx.doi.org/10.1109/PACIFICVIS.2008.4475455 conf/apvis/2008 db/conf/apvis/pacificvis2008.html#JiSG08