The observed brightness of a Lambertian surface may be written as the product of an albedo factor, p, and the cosine of the incident angle, cos i. This means that brightness can be written as a product of a term that depends on the material, p, and a term that depends on surface direction, which in turn depends on f and g.
| Game | Time | WPM | Accuracy |
|---|---|---|---|
| 3440 | 2017-01-15 15:46:28 | 58.07 | 92% |
| 3434 | 2017-01-14 20:01:37 | 64.25 | 96% |