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Chapter 1: Gamemastery Basics / Encounter Design / Encounter Locations

Wild Weather

Source Gamemastery Guide pg. 47
On a bright, sunny day, the PCs see clearly and fight without obstruction, but adding wind, precipitation, or fog creates additional challenges. Rain creates sloshy, muddy ground that slows movement, and cold weather introduces the threat of slippery patches of ice. Only the most extreme temperatures have a direct impact on the PCs during an encounter, but a slog through blistering heat or freezing cold can leave the PCs worn out and more vulnerable to foes. Light levels play a key role in both outdoor and indoor encounters. Although torches are plentiful, their reach is limited, and lights are sure to draw attention in dark areas.