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 |
|---|---|---|---|
| 1883 | 2017-11-21 01:40:07 | 97.97 | 97% |
| 431 | 2017-03-24 21:17:17 | 85.67 | 90% |