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FSXA Disappearing Fence

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art209

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unitedstates
For the first time, I have experienced a problem with the boundary fence disappearing at an airport at a wide range of view angle. Suspecting that this was issue that had been discussed before, I did a search uncovering results indicating that it was an FSX glitch dependent on geographic location that could not be overcome. Is my perception of forum discussions on the matter summarized correctly?

Art
 
art209 said:
For the first time, I have experienced a problem with the boundary fence disappearing at an airport at a wide range of view angle. Suspecting that this was issue that had been discussed before, I did a search uncovering results indicating that it was an FSX glitch dependent on geographic location that could not be overcome. Is my perception of forum discussions on the matter summarized correctly?

Art
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Some airports in certain areas do have this problem. I don't think anyone ever came up with a fix. You can see the fence at one angle but it will disappear at another angle.
 
I found a workaround (with some side effects). As best I can tell the problem seems to be a terrain altitude z-order (front to back ordering) issue. FSX thinks that something (presumably higher than the fence base) beyond the fence is blocking the view of the fence. Ordinary flattens do not seen to have enough priority in the rendering system to fix this. The following works in the cases I have found:

1. Place the plane in front of the fence around the middle of the area it disappears.
2. Angle the plane so it is in the middle of the left to right pointing where the fence disappears.
3. Add a 1 meter square transparent closed helipad around 200-300 feet directly in front of where the plane is pointing.

The above has caused the fence not to disappear in the cases I have worked with. In some cases I had to play around and have more than one helipad.
Apparently the helipad flatten has the same high priority as a runway flatten and prevents the issue.

This has 2 side effects that I know of. First it puts a 1 meter square "H" at that location. Secondly it probably does some degree of terrain flattening. Since it is probably a decent distance from the airport in most cases this should not be too much of an issue. In the cases where it is nearer to the airport it probably can be hidden by careful use of other objects.

It may also cause some menu issues if you are flying a helicopter looking for a helipad (I have never tried that so I do not know if there is a helipad menu).
 
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