Lighting describes the visibility of an area, Creatures with darkvision improve the lighting tier by 1, while true sight ignores lighting,
Bright light means full visibility
Areas in shadow or lit by weak light sources are in dim light. Creatures in dim light gain a -2 penalty to attack rolls and perception checks, and are considered lightly obscured. However dim light combined with light or standard cover can provide heavily obscured
Areas in shadow or lit by weak light sources are in dim light. Creatures in dim light are considered blinded, and are considered heavily obscured. Creatures inside are automatically concealed when in darkness.
Just like cover, obscurement is directional, you may have it vs some creatures and none from others. If so, you are hidden from one, and not hidden from another. See the Point Out Action
Tall grass, bush, light fog
-4 to Stealth Checks
Pitch darkness, thick jungle, heavy fog. If you benefit from standard cover, you are considered heavily obscured
Default Stealth Check
No way to see, completely covered, thick wall. If you benefit from heavy cover, you are considered completely obscured
+4 to stealth check.
1 Action
You can attempt to hide from an enemy provided you are obscured from. When you do so, you make a stealth check against the target’s passive perception DC. This stealth check is also used against any seek action
You are considered hidden until you are discovered. This can happen either with the seek action or
1 Action
You can attempt a seek check to locate a creature hidden from you. Make a perception check vs the creature’s stealth roll. On an equal or higher level, the creature is no longer hidden from you.
Free Action
A creature can point out a creature who is hidden from another creature. When done, the creature's stealth check is reduced by 5. This stacks
When you make an attack when attacking when hidden, the target is considered off-guard. However if you move more than 10ft before attacking, you must make another stealth check. If the target is in melee, or doing something(such as holding an action against someone other than you), you gain advantage in the stealth check.
If the party is making a group stealth check, the GM takes the average rolls of everyone stealth checks.
Characters must make repeat stealth check at the GM’s discretion based on the situation. Usually this should be when entering a new area, or when new variables are added.