I want a unit not to be able to see stuff behind him, only in front of it (certainly relative to where the unit is looking)... is it possible?

It does not seem to be possible to edit a units sight into an arc. If this is possible through some other means (triggers or something) it would be very difficult.

If you can move a sight blocker like the grass/smoke from vanilla sc2 with triggers and place it behind the hero every frame, you might be able to do something. Otherwise I dunno.

Maybe you can just move a region in front of the unit which provides vision.

I feel dumb for not doing this before, I was trying to hard to make it arc like. Here is a demo map where a unit can only ever see in front of itself. I'm working on something a little better as well.

Edit: Slightly better version attached.

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Post has been edited 1 time(s), last time on Aug 9 2010, 5:42 pm by Temp.

Ha! this is really impressive, thanks a lot, dude

And easy to make, I have no idea why this did not come to my mind

Not sure because I do not have access to the editor yet, but I believe you've just solved the Problem #13.
http://www.staredit.net/topic/11886/