Fig. 3

The key idea of the extension. Many triangles move from the start (t = 0) to the end (t = 1) of a frame. Left in our algorithm, we store all visible time ranges of each triangle at the pixel K of the temporal shadow map. At a certain time, t, a sample H is visible to the camera and we need to load each visible sample of each triangle to perform the shadow tests. Right in the extension, we only store information of the blue triangle at the pixel K. A highlighted region in the blue triangle denotes an area where this triangle continuously covers some pixels (including the pixel K) during a time interval of a frame