*Note to other mods here. Please do not edit this post.
PLEASE READ THIS ENTIRE POST you may learn something new

Just for clarity on the terrain situation, here is what the Epic Armageddon rules say about it:
Quote:
Design Concept: Terrain Conventions
It is possible to have all kinds of arguments about whether terrain partially or fully blocks the line of fire to a target. Because of this, you should discuss the terrain on your gaming table with your opponent before a game starts and make sure you both agree on how it will work with regard to this and any of the other terrain rules. However, the -1 to hit modifier should be generously applied, and if in any doubt it should be counted rather than ignored.
Quote:
1.8.2 Cover to Hit Modifiers
Units that are in terrain that is tall enough to at least partially obscure them from an attacker’s view receive a -1 to hit modifier when being shot at (see 1.9.5). The to hit modifier also applies if intervening terrain obscures the target partially from view.
Quote:
Example of play: Terrain
The Shadowsword has moved into a hull down position behind a low ridge. From this position it counts as being in cover against attacks from the Ork formation with the Battlefortress and Buggies attacking it from the front, and so they will suffer the -1 to hit modifier. However, the Ork Gunwagons have manoeuvred to a position where the ridge does not block their line of fire, and so they do not suffer the penalty.
Quote:
1.8.4 Terrain Effects
Hills
Units on hills will benefit from better lines of sight to enemy units, as they will be high enough to see over some terrain features (see 1.9.2, Line of Fire). This aside, units on hills count as being in open ground (or whatever other type of terrain they occupy that is also on the hill, such as roads, woods or buildings).
Quote:
1.9.2 Who May Shoot
In order to shoot, a unit must be in range and have a line of fire to at least one unit in the target formation, and must not be suppressed.
Line Of Fire
The line of fire is a straight line drawn from the shooting unit to one unit in the target formation. The line of fire is blocked by terrain features such as buildings, hills, woods, etc. Weapons higher up can often see over any terrain that is lower down. Buildings, rubble, woods, fortifications and the like don’t block the line of fire to or from units that are in the terrain itself unless the line of fire passes through more than 10cms of the terrain feature (i.e., you can shoot 10cms into a terrain feature, but the line of fire is still blocked to units on the other side). The only units that can block the line of fire are war engines (see 3.0). Other units do not block the line of fire for friend or foe.
See the above quotes for clarification on the 10cm into terrain rule.
Quote:
Shooting Conventions
The following principles apply to shooting:
Design Concept: Measuring Ranges
You must decide with your opponent how you will measure the range between two models during a game. The method used by the author (and the default you should use if you can’t agree to an alternative) is that a weapon is in range if any bit of the attacking weapon is within range of any part of the target model (or at least one of the models on a target stand).
Lines of Fire
In Epic, the terrain and the models are assumed to be the same scale, so if you want to check a difficult line of sight between two units, all you need to do is bend over and get a model’s eye view to see if they are in each others line of fire.
Pre-measuring
You must decide with your opponent if you are allowed to pre-measure distances during a game of Epic, or if you must declare charges or shooting attacks before measuring. For example, you must decide if you can measure to make sure a unit is within range of the enemy before deciding who it will shoot at, etc. Each method has its own distinct advantages, which boil down to pre-measuring being more precise and tactical, and not allowing pre-measuring being more characterful and exciting. If you cannot agree on which method to use then use the author’s method, which is to allow pre-measuring.
This is exactly what the rules say about terrain.
The FAQ wrote:
1.9.2: Who May Shoot.
Q: What blocks line of sight (other than obvious terrain)?
a) Enemy models
b) War engines (friend or foe)
c) Friendly models other than your detachment - group - whatever
d) Stands within your own detachment.
e) Ruins
f) Shoot at whatever’s in range and not blocked by hills or large buildings?
g) I misunderstood something...
A: The answer is b, e & f. Terrain blocks the LOF, units don’t.
We get many questions about terrain and this thread is there to help players find an answer for themselves.
There is no agenda or bias.
If you play a variation of these rules that is
fine. No one is trying to tell you that you're wrong. This is just a game and these are just the rules as written.