How far an enemy can see?

How would i go about setting how far an enemy can see?

I've tried editing m_flFieldOfView in npc_combine, but if its a positive number the npc doesnt see me at all. Anything negative seems to be the same?

thanks in advance

I beleive you can set it using SetDistLook, do a search for flDistLook to see if there is a DEFINE for the NPC you are interested in.

Found it, thanks for the help.

For anybody else wanting to know:

flDistLook is used, but equals m_LookDist. So look for m_LookDist in AI_Senses.h,
its default value is 2048.

Update:

Ok, looks like they don't use that variable often, and just use the value 2048. So search for that value =)