[Unsolved] Trying to increase maxseedist (A_LookEx) on a friendly marine, not working

actor MyMarine : MarineChaingun
{
  Speed 0
  +ALWAYSFAST
  +INVULNERABLE
  +FRIENDLY
  -SOLID
  +FLOAT
  +NOGRAVITY
  +MISSILEMORE
  +MISSILEEVENMORE
  +QUICKTORETALIATE
  +DROPOFF
  +STANDSTILL
  
  States
  {
	Spawn:
		PLAY A 1 A_LookEx(0, 0, 0, 0, 360, "Missile")
		Loop
	Idle:
		PLAY A 1 A_LookEx(0, 0, 0, 0, 360, "Missile")
		Loop
	See:
		PLAY A 1 A_LookEx(0, 0, 0, 0, 360, "Missile")
		Loop
	
	Missile:
		Missile.Chaingun:
			PLAY F 1 Bright A_CustomBulletAttack(0, 0, 1, 5000, "MarinePuff", 8192.0)
			Goto Idle
  }
}

actor MarinePuff : BulletPuff
{
	DamageType "MarineFire"
}

The important part is

A_LookEx(0, 0, 0, 0, 360, "Missile")

According to the wiki (http://zdoom.org/wiki/A_LookEx), setting the third parameter to zero should have unlimited sight distance. He never seems to check more than about 256 map units away. Any ideas?

User Demolisher on the ZDoom forums also had the same question go unanswered:
http://forum.zdoom.org/viewtopic.php?f=3&t=27460#p524814

Does A_Look behave the same way? Could you use it instead, perhaps in combination with +LOOKALLAROUND?
What happens if you just give a really large number for maxseedist?

plums said:

Does A_Look behave the same way? Could you use it instead, perhaps in combination with +LOOKALLAROUND?
What happens if you just give a really large number for maxseedist?

A_Look doesn't have any way to change view distance as far as I'm aware.

Putting large numbers (I tried 8192) has no effect. It appears to be stuck at 256 map units for a max distance. It does go lower, though. The number 1024 seems to be equal to 256 map units. If I do 512, he can see about 128 map units.

I've also tried MaxTargetDistance and MinMissileChance to no avail.