Illumination and Darkness
Illuminating Items
| Example | Radius |
| Candle or embers | 1 m |
| Flaming brand or lantern | 3 m |
| Campfire | 5 m |
| Bonfire | 10 m |
| Light spell | 10 m but, unlike natural light sources, the Light spell only illuminates a 10 m radius and does not provide partial darkness or darkness to areas beyond this radius. |
Dark Sight
This ability allows the character to treat pitch-black conditions as if dark. It is normally possessed by subterranean or darkness aligned creatures.
Night Sight
This ability allows the character to treat partial darkness as illuminated and darkness as only partial darkness. Nocturnal creatures normally possess this.
Illumination and Darkness Effects
The following table gives the effects of various types of illumination and darkness on the characters.
Illumination Effects
| Environment is | Effects |
| Brightly Illuminated | None. |
| Illuminated | None. |
| Partial Darkness | –20% to vision-based Perception tests. |
| Dark | -50% to vision-based Perception tests. Movement Rate halved. |
| Pitch Black | Perception tests reliant on vision become near impossible, as are ranged attacks. Close combat attacks are at -50%. Movement rate a quarter of normal. |