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Deploy on different slope - player floats and only bipod touches ground
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The player seems to float in the air if the weapon is deployed on a different terrain slope from the slope that the player's torso and legs are on. Only the bipod touches the ground.


Operating System
Windows 7 x64
Operating System Version
Windows 7 x64 SP1
Steps To Reproduce
  1. Open the editor and create a mission with the following traits.
Position an autorifleman at the edge of a downward slope. An example is posATL: [20003.2,18965.2,0], direction (Z rotation): 33.2518 on Altis. Place 5 large grass cutters in the immediate vicinity in order to see the edge between the slopes clearly. See attached mission with the correct conditions to reproduce the problem on Altis. It is necessary to configure the game difficulty settings to a low enough setting, such as Recruit, that 3rd person mode is available.
  1. Start the mission, go prone and deploy the bipod. Assume that the enemy is at the docks to the player's front, specifically grid reference 206 194. Notice that the player hovers in the air and appears to be supported only by the bipod. This exposes more of the player to the enemy than is necessary.

Example mission:


Additional Information

Mods used

Arma 3 Version
1.80.143869 (stable)

Expected behavior
When the player deploys his bipod the expected behavior is that his body will be supported by the ground and the bipod will also be supported by the ground.

Actual behavior
When the player deploys his bipod the actual behavior is that his body is NOT supported by the ground, and only the bipod is supported by the ground.

Importance of resolution
This type of position is apparently the ideal Support by Fire position on natural terrain. The body is positioned in defilade (behind a hill relative to the enemy) and the machine gun is positioned so that it has line-of-fire of the enemy. This reduces the exposure of the gunner; only his head, hands and upper torso are exposed. See page 2 of

Event Timeline

Nordic_Harold changed Severity from None to Minor.
Nordic_Harold changed Reproducibility from N/A to Always.
Nordic_Harold edited Steps To Reproduce. (Show Details)
Nordic_Harold updated the task description. (Show Details)
Nordic_Harold edited Additional Information. (Show Details)
Wulf added a subscriber: Wulf.Mar 21 2018, 4:25 PM


I have tested it in your attached mission and I was not able to reproduce the issue. Could you please provide a video of the issue so that I might figure out what I am doing differently?

Thank you.

Nordic_Harold added a comment.EditedMar 21 2018, 11:27 PM

Here is a video demonstrating the problem. I took my hand off the mouse (so that I didn't accidentally change the direction that the player was facing), pressed the key to go prone, pressed the key to deploy the bipod and then held Alternate to look at different angles. Clearly the player is hovering in the air, supported only by the bipod.

540p video, 30 fps, 1.9 MB

Wulf added a comment.Mar 22 2018, 10:23 AM

Tested it again. It seems that this issue is fixed in our internal build, will have to wait for the next Dev Branch and test it again if the issue persists.

Either that or the positioning of the player is different in the internal build. Is the player's bipod on a slope that declines toward the enemy position and the player's body on a slope that declines away from the enemy position? Maybe you could record a video of how it looks in the internal build?