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Ground Polys and ground line not showing in FSX

G

gww53

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172
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us-newyork
For some reason, none of the GP or GP lines in this project are displayed in FSX (Win 10). I've not had problems before--and a project from a few days ago is fine. These are all default GP textures (these and my own worked on another project yesterday)

Tried adding a flatten thinking somehow they were "off" a bit, but no luck

No error messages at compile, and nothing in fault finder (tho I don't think it check GP's). I've tried to check for crossed vertices. I wonder if there is a problem that the large gp apron has too many vertices...

If anyone has an idea... I've attached the ADE file

Gary

EDIT: tried deleting the largest gp and that has no effect. Tonight I'll try deleting each of the GP (there are only 4 in this small project) and see if they are somehow mis-created--often an accidental double-click of the mouse messes up a vertex, but I can't find one..)
 

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Hi, Gary. If you view your airport from above, you'll see that the GPs are there. And, even on the ground, if you go to the north end of that large poly, you'll see that a portion of it is there. However, most of that poly is below ground.

Your ARP elevation is 103.99, The terrain elevation is 104.00, While that small difference is not enough to "bury" airport elements, it is enough to inhibit viewing of the G's from the cockpit.

Change/add a flatten at 103.99 and all should be well.

Don
 
Thanks, Don

After your response, I see the project as you do--at altitude, the GP's appear. My flatten already was at 1003.999. I changed it to 1003.99 then 1002 (and had excavations around all the elements) but the GP still displays just at altitude. I deleted, and created a new flatten with and without mask class and autogen suppression, and still the same. No difference if I add the land class on top or leave it out.

I believe some of the larger poly is "outside" the original airport border, but I would assume the flatten would correct for that.

I"ve never tried any of the GP compile options ("compile.jpg) and I'll experiment with them.

Thanks for your help
I've done something again and don't know what....yet

Gary
 

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That did it!! I compiled with the second GP compiler option, "Single Ref Point, Local Elevation, Full Visibility" and all is well. I've never used anything but the first option on many dozen airports.

Thanks for you help
 

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Obviously, elevation was a "red herring".

It seems to be a round earth issue. If you compile with anything other than the default GP option, the GPs display. And you'd want to do this because if you don't, autogen is going to be suppressed all around. To reduce autogen suppression, use the bottom (third) option with a small enough number in the Group Size textbox that no (or little) useful autogen is suppressed.

Don

EDIT: Looks like our posts crossed.
 
Wow, a forum is so interesting!
I had about the same problem here.
But I had deleted my flattens (I don't know why).
Because of this, my GPs had disappeared as well.
So I made a new flatten and the problem is solved.

Thanks again, Don.

Peter
 
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