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 |
|---|---|---|---|
| 3886 | 2017-05-29 18:55:41 | 71.23 | 92% |
| 3614 | 2017-03-09 04:05:55 | 72.76 | 93% |