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 |
|---|---|---|---|
| 16282 | 2017-01-22 12:58:04 | 93.88 | 99% |
| 16176 | 2017-01-17 11:21:24 | 93.04 | 95% |