•Extension to shadow
mapping
•How Percentage-Closer
Filtering (PCF) works:
Percentage-Closer Filtering
Pixel to be Shaded
4-Sample PCF
Perform 4 Depth Tests
Typical Shadow Map Test
Shaded Pixel
(Black
or White)
Shaded Pixel
(0,
0.25, 0.50, 0.75, 1.0)