Rules Index | GM Screen | Player's Guide

Chapter 2: Building Games / Encounter Design / Encounter Locations

Budgeting for Terrain

Source GM Core pg. 77
If you include terrain that’s tricky to navigate or takes extra work to deal with, consider whether it should count toward the encounter’s XP budget. A fight that requires Climbing, Swimming, or pushing through difficult terrain can be much tougher—especially if the enemies have strong ranged attacks. Think about the impact of the terrain in advance, especially if the battle would already be a severe threat, or you might kill the party. You can pick an equivalent monster level for your terrain and factor that into your budget, or just assign extra XP at the end if the threat without terrain is on the low or moderate end.