Let's say you're the worst pilot in history of Xwing and somehow you manage to cross one asteroid plus another one with your maneuver template, finally coming to a halt right on the third asteroid.

Do you have to roll dice for damage three times then? No action, no attack this round... right?

Correct.

Yes... but remember that if you shoot or are shot though them... they only add one die. The shot is just "obstructed" whether its through one asteroid or all 6.

3 minutes ago, shaunmerritt said:

Yes... but remember that if you shoot or are shot though them... they only add one die. The shot is just "obstructed" whether its through one asteroid or all 6.

Precisely. In the activation phase, every obstacle counts individually - you suffer the effects of each one separately. But in the combat phase, there's no redundancy for multiple obstructions - either the shot is obstructed (no matter how many obstacles you cross), or it's not (a clean shot).

Quote

O BSTACLES
(second bullet from top of right hand column on page)

• If a ship moves through or overlaps more than one obstacle, it suffers the effects of each obstacle, starting with the obstacle that was closest to the ship in its starting position and proceeding outward.

Star Wars: X-Wing Rules Reference | page 14

Given that obstacles have to be placed range 1 apart, is it even possible to hit more than two?

And I'm sure OP was asking for a friend.

2 hours ago, ObiWonka said:

Given that obstacles have to be placed range 1 apart, is it even possible to hit more than two?

And I'm sure OP was asking for a friend.

Start on one so that your template has to go through it and do a 5 forward. With the tiny mustache asteroids ahead of you there would be JUST enough room to fly through the one you're on, run over a mustache, and land base on a third. (Range 1 = 2.5 base lengths, 5 forward moves you 5 bases lengths, and because you move front to back you're ship is covering a distance of 6 base lengths. If the mustache is <0.5 base lengths wide where you clip it you could cross enough space to "run over" 3 legally placed asteroids.)

In standard format you basically have to plan this...

--

In epic asteroids are placed in pairs R2 apart with each asteroid within R1 of each other. A LOT easier to clip 3 asteroids in one go here, technically possible to clip 4...again you need to do a 5 forward off of an asteroid you haven't fully cleared the round previously and put in effort to make this happen...

It helps if your base is pretty big, too.

In the original rules, it was only 1 effect. However in the TFA core they changed it to be each.

Shooting still doesnt stack though.