GPU Pro 6

330 IV Shadows

Figure 2.4. A tiled shadow map (generated for the scene in Figure 2.5) with a resolution

of 8192 ×8192. The tile size is clamped between 64 and 512. Since the scene is rendered

with view frustum culling of invisible light sources, for 117 out of the 128 medium-sized

moving point lights, an individual shadow map tile is generated. With this texture and

clamped tile resolution, in the worst case, shadow map tiles for 256 light sources can

still be stored in the tiled shadow map.

omnidirectional light sources can be stored in a limited texture space than with

traditional shadow mapping systems.

2.3.4 Shading

Finally, the tiled shadow map