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 |
|---|---|---|---|
| 4626 | 2018-02-07 17:55:43 | 50.70 | 95% |
| 2800 | 2017-03-12 21:23:31 | 61.58 | 91% |