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 |
|---|---|---|---|
| 1761 | 2019-11-15 01:00:50 | 70.04 | 97% |
| 424 | 2018-04-02 15:57:42 | 63.26 | 97% |