related: http://www.cs.technion.ac.il/~gotsman/AmendedPubl/ModelingAndRendering/Model.RenderEscher.pdf http://www.cs.technion.ac.il/~gotsman/AmendedPubl/Modelin

related: http://www.cs.technion.ac.il/~gotsman/AmendedPubl/ModelingAndRendering/Model.RenderEscher.pdf http://www.cs.technion.ac.il/~gotsman/AmendedPubl/ModelingAn...