GPU Pro 6

232 III Lighting

Transparent object Transparent object Solid object

Figure 3.10. Multiple layers of opaque and transparent objects and trilinear 3D texture

filtering.

3.3.7 Fighting Low-Resolution Under-Sampling Artifacts and Aliasing

Problems

A common rendering problem is aliasing and under-sampling of geometric edges,

shading, shadowing, and many other rendering pipeline elements. It happens

when trying to sample complex, high-frequency signals in much lower resolu-

tion. While volumetric lighting in general is rather low frequency, the volumetric

textures we used are so low resolution that some aliasing artifacts are inevitable.

In the case of Assassin ...