Editing Warmachine/Tactics/Gameplay Basics (section)

==Terrain==
Terrain can affect unit actions, being beneficial such as giving defense bonuses, or slowing you down preventing you from reaching a target. You and your opponent should agree on what everything is before deployment.

===Open, Rough, and Impassable===
Open terrain doesn't impede progress and lets you move normally. Rough terrain slows movement, and impassable terrain is exactly what it sounds like.

===Features===
Any piece of terrain that isn't the ground itself is a terrain feature, like walls, buildings, and forests.
*Water comes in two types: shallow and deep. Shallow water slows you down and can make warjacks stationary if they're knocked down in it. Deep water can hurt infantry and destroy jacks, and prevents most actions.
*Trenches protect against blast damage and give cover as long as the source of either isn't in the trench.
*Forests are rough terrain that grant concealment and mess with Line of Sight.
*Hills can be either rough or open terrain and elevate models, letting them see and be seen over models of equal or smaller size that aren't elevated. They also provide a DEF bonus against attacks from below.
*Obstacles are anything you could climb and stand on top of. Anything you'd need to climb '''over''' but couldn't stand on - like a fence - is a linear obstacle. Linear obstacles don't slow your movement, but cannot be charged through unless the model has pathfinder. Walls that are less than 1" thick are linear obstacles.
*Obstructions are stuff that can't be moved through or climbed over, like a house or really big rock. Obstructions grant a DEF bonus against melee attacks if the target is obscured by it.
**On a side note, there's Smoke. Its not a regular terrain piece, but an AOE that can be dropped by certain models. Smoke gives concealment to models within it and blocks line of sight to models behind it, making models that generate it extremely powerful defensively.

===Cover===
Cover, as you'd expect, is a DEF bonus against shooting and magic attacks granted by terrain. Concealment is a smaller bonus that comes from stuff that would conceal a model but not stop something, like bushes or smoke. Cover is a large bonus that comes from stuff that would stop something. The bonuses don't stack.