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 |
|---|---|---|---|
| 2410 | 2017-05-31 22:53:09 | 83.88 | 89% |
| 2402 | 2017-05-31 22:42:29 | 88.72 | 92% |