원문: http://http.developer.nvidia.com/GPUGems/gpugems_ch07.html Chapter 7. Rendering Countless Blades of Waving Grass Kurt Pelzer Piranha Bytes 7.1 Introduction To simulate an idyllic nature scene in a realistic fashion, besides detailed trees and bushes, as well as a complex water and sky dome simulation, we need a high-quality grass effect. We must be able to cover large areas of the terrai..