April 2013
Intermediate to advanced
382 pages
11h 42m
English
Content preview from GPU Pro 4
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2. Real-Time Ptex and Vector Displacement 79
Resolution
Border Size
124
4 × 4 56/56% 75/75% 89/89%
8 × 8 36/41% 56/62% 75/80%
16 × 16 21/24% 36/41% 56/62%
32 × 32 11/13% 21/23% 36/40%
64 × 64 6.0/6.4% 11/12% 21/23%
128 × 128 3.1/3.2% 6.0/6.2% 11/12%
Table 2. 2. This table shows memory overhead for borders. The first percentage in each
pair is for a single resolution, and the second is for mip chains down to 4 × 4. These
values should be weighed against the waste inherent in a conventional texture atlas,
such as the 37% illustrated in Figure 2.4(b).
2.7 Alternatives and Future Work
One way to avoid having a separate texture per face is to put each per-face
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