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 |
|---|---|---|---|
| 485 | 2017-03-07 21:49:09 | 78.68 | 96% |
| 142 | 2017-02-17 14:14:35 | 70.08 | 94% |