Smoke

Smoke is the result of an active fire. The closer you are to the burning fire, the thicker the smoke will be. Light smoke occurs in well ventilated area or areas farther from the source of the fire. Thick Smoke occurs in enclosed areas or areas close to the source of the fire.

Light Smoke

Light smoke is a mildly obstructive atmospheric condition that can hamper vision and other sensory perception to a certain extent. While you can generally see through light smoke, details can become blurred and distant sights may be obscured. Light smoke can also mildly affect breathing, but it's generally not thick enough to cause significant discomfort. Areas of Light smoke have the following effects:

• Light Smoke is Partial Concealing Terrain (Vision, Smell, Blocking, 30ft distance).

Thick Smoke

Thick smoke is an intensely obstructive atmospheric condition that significantly impedes vision and other sensory perception. In thick smoke, visibility is greatly reduced, and details even at close range are obscured. Breathing within thick smoke can be extremely difficult and can lead to coughing, choking, and other respiratory issues. Areas of Thick Smoke have the following effects:

• Thick Smoke is Total Concealing Terrain (Vision, Smell, Blocking, 20ft distance) and Partial Concealing Terrain (Vision, Smell, Blocking) at closer distances.
• Every round a breathing creature is within Thick Smoke, it must make a DC 15 Resilience check or gain 1 point of Fatigue. A creature can partially mitigate this effect by holding their breath before entering the Thick Smoke (but holding their breath after breathing in the Thick Smoke does not help). The creature cannot restore Fatigue until it spends at least a moment in an area of fresh air.