Shadow Map以非同步的方式於CPU端來計算，可以平衡CPU與GPU的工作負載。-Onloaded Shadows is a technique by which shadow maps can be calculated asynchronously on the CPU. By using cascades, the shadow map for objects near the camera are calculated every frame on the GPU, but the

poisson圆盘采样，运用在凝视风格聚焦技术中，即远处的图像模糊，近处的清晰，节省计算机资源。-Poisson disk sample used in gaze style focusing technique, i.e. image blur distant, near clear, saving computer resources.

channel coding near shannon limit