Terrain Rules

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Environments make frequent use of the rules for difficult terrain, greater difficult terrain, and hazardous terrain, so those rules are summarized here.

Difficult terrain is any terrain that impedes movement, ranging from particularly rough or unstable surfaces to thick ground cover and countless other impediments. Moving into a square of difficult terrain (or moving 5 feet into or within an area of difficult terrain, if you're not using a grid) costs an extra 5 feet of movement. Moving into a square of greater difficult terrain instead costs 10 additional feet of movement. This additional cost is not increased when moving diagonally. Creatures can't normally Step into difficult terrain.

Any movement creatures make while jumping ignores terrain that the creature is jumping over.