Page MenuHomeFeedback Tracker

AI Can still see through Grass
Assigned, WishlistPublic


AI can see and engage the player through grass


Legacy ID
AI Issues
Steps To Reproduce

load altis or stratis with AI present, find a hill in between you and the AI and crawl to the crest and observe when they see and shoot you.

Additional Information

Adjust your view setting to turn on and off the grass to get a better perspective.

Event Timeline

MikeLawObrien edited Additional Information. (Show Details)
MikeLawObrien set Category to AI Issues.
MikeLawObrien set Reproducibility to Always.
MikeLawObrien set Severity to None.
MikeLawObrien set Resolution to Open.
MikeLawObrien set Legacy ID to 1537534330.May 7 2016, 4:46 PM

I still dont understand why this hasnt been fixed before complete release?

Can you please create repro mission for this? Thank you.

Linkin added a subscriber: Linkin.May 7 2016, 4:46 PM

Consider this scenario:

AI are at the top of a relatively steep hill looking down. You are moving up or at the bottom looking up. In this scenario the AI are able to see and shoot you when you cannot physically see them (from first person mode)

I have experienced this in both A2 and A3

Addendum: Your stance doesn't matter to the AI. They always seem to catch you out when you cannot physically see them.

EDcase added a subscriber: EDcase.May 7 2016, 4:46 PM

Its very easy to prove this is a problem:

Place an enemy in front of you on a flat grassy area.
Set a waypoint with 'danger' so that he goes prone.

Now try and engage that enemy while prone.

He will ALWAYS spot you before you see him.

If you turn off grass (set ground detail to lowest) you see why.


This still appears to be true and regardless of relative position (higher, level or lower than AI) and also at varied distances (<50m to >300m). The AI usually sees through grass before the player can see them - this even when using very low stances and if 'sneaking' or 'hiding' near AI patrols.

This issue isn´t only with grass the enemy seems to ignore any kind of vegetation like bush, leafs of trees etc.

This is still a problem with latest version. Is this being investigated AT ALL?!?!?

Frustration is almost equal to enjoyment with this game!

ai behavior depends on unitpos ->

really a problem...

Still one of the most annoying things in ARMA3

This comment was removed by Dwarden.
This comment was removed by Dwarden.

This issue should be a high priority.

It's a 'stitch in time' issue that leads to a plethora of gameplay issues with singleplayer and co-op scenarios, with many situations causing players to be confused or misled as to why they were killed (i.e. they may mistake it for some other issue). Basic firefights, even with the strategic advantage, become unnecessarily difficult and frustrating in grassy areas. With a map like Altis, way too many approaches and situations are completely denied to players simply because they would have no chance against the AI if caught fighting in an area where the AI are able to accurately fire from safe cover of tall grass, with completely obscured line-of-sight, because they 'see' through the grass under certain conditions. This advantage that the AI currently has isn't realistic or gameplay-sound and completely destroys immersion and motivation for those who mainly play singleplayer or co-op.

I'm not familiar with the engine programming, but I'm going to start learning it through the community wiki in my spare time to hopefully be able to contribute to the issue. Hope it gets fixed eventually.