GPU Pro 5

2. High Performance Outdoor Light Scattering Using Epipolar Sampling 121

Profile SM Res First N

Slices

N

Samples

Time, Mem,

×N

Cscd

cascade ms MB

Brute force 1024

2

× 6 1 209.6

High qual 1024

2

× 6 1 1024 1024 23.6 60

Balanced 1024

2

× 5 1 512 512 10.35 18

High perf 512

2

× 4 2 512 256 6.19 7

Tab l e 2 . 2. Quality settings for Intel HD Graphics 5000 (1280 × 720 resolution).

0

1

2

3

4

5

6

Reconstruct

Camera Z

Render

Coord

Texture

Render

Coarse

Inscattering

Rene

Sampling

Build 1D

Min/max

Trees

Ray March Interpolate Transform to

Rect Coords

ms

High quality Balanced High performance

Figure 2.10. Performance of different stages of the algorithm on Intel HD Graphics

5000 (1280 × 720 resolution ...