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 |
|---|---|---|---|
| 443 | 2018-04-18 12:46:53 | 63.81 | 97% |
| 242 | 2018-04-03 16:26:27 | 64.42 | 97% |