This is a useful cheat sheet I created for understanding what characters can see in the wilderness. In practice, sight lines will vary quite a bit (due to hills, forest canopies, and other obstructions), but I’ve found it useful to have some reference points and rules of thumb.
HORIZON: The horizon is 3 miles away at sea level.
NEIGHBORING HEXES: Passing through the center of a hex, neighboring hexes cannot be seen. If the path is biased, the nearest hexes can usually be discerned (depending on terrain).
MOUNTAINS: Mountains can be seen from 6 hexes (75 miles away).
ELEVATION: Distance to the horizon in miles is the square root of (feet above sea level x 1.5 feet). Add the height of tall objects to the viewer’s. Atmospheric haze will eliminate the ability to see even the largest objects more than 3-5 hexes away.
|10 ft.||4 miles|
|25 ft.||6 miles|
|50 ft.||9 miles|
|100 ft.||12 miles (1 hex)|
|400 ft.||24 miles (2 hexes)|
|1000 ft.||39 miles (3 hexes)|
|1500 ft.||48 miles (4 hexes)|
|2500 ft.||60 miles (5 hexes)|
|Terrain||Encounter Spot Distance|
|Desert||6d6 x 20 feet|
|Desert, dunes||6d6 x 10 feet|
|Forest (sparse)||3d6 x 10 feet|
|Forest (medium)||2d8 x 10 feet|
|Forest (dense)||2d6 x 10 feet|
|Hills (gentle)||2d6 x 10 feet|
|Hills (rugged)||2d6 x 10 feet|
|Jungle||2d6 x 10 feet|
|Moor||2d8 x 10 feet|
|Mountains||4d10 x 10 feet|
|Plains||6d6 x 40 feet|
|Swamp||6d6 x 10 feet|
|Tundra, frozen||6d6 x 20 feet|
This material is covered by the Open Game License.