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Problem with runway lights

Postby Anarcho-pilot » Thu May 24, 2018 8:20 pm

Since I've upgraded to version 2018.1.1, I've got all approach lights visible from the both sides:
Image
Does someone else have the same problem or any ideas how to solve?
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Re: Problem with runway lights

Postby RJ5576 » Fri May 25, 2018 7:44 pm

I think that's normal. It may be unrealistic, but as far as I know, FlightGear has always done that.
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Re: Problem with runway lights

Postby Thorsten » Sat May 26, 2018 6:27 am

We do have directional lights supported, and last time I checked this did work.
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Re: Problem with runway lights

Postby Anarcho-pilot » Sat May 26, 2018 5:38 pm

Here is the same place at the same time in FlightGear 2017.3.1 on another computer:
Image
Before version 2018.1.1 everything was ok on both computers. RJ5576, do you use FG 2018.1.1 and have the same problem?
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Re: Problem with runway lights

Postby wkitty42 » Sat May 26, 2018 6:19 pm

Anarcho-pilot wrote in Sat May 26, 2018 5:38 pm:Here is the same place at the same time in FlightGear 2017.3.1 on another computer:

these lights are different... these are little round balls whereas the others are points (aka point sprites)... check the F10->View-Rendering_Options on both systems and make sure they are the same...

please, also tell us which airport you are at so others can try to duplicate your situation...
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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Re: Problem with runway lights

Postby Anarcho-pilot » Sun May 27, 2018 2:25 pm

wkitty42 wrote in Sat May 26, 2018 6:19 pm:please, also tell us which airport you are at so others can try to duplicate your situation...

In my case this problem spreads worldwide. My screenshots were taken at UKHH, runway 07.
wkitty42 wrote in Sat May 26, 2018 6:19 pm:these lights are different... these are little round balls whereas the others are points (aka point sprites)... check the F10->View-Rendering_Options on both systems and make sure they are the same...

Yes, on the first screenshot point sprites are enabled and on the second - disabled. This is because the second computer has low-power GPU which cannot display them correctly. But this option doesn't mention. Here is the same place on the first computer without point sprites:

Image

Also pay attention at 18 threshold lights on the very first screenshot. They are brown. This is because they must be red in the one direction, green - in the another, and now this colours are mixing. Same with 11 pink centerline lights, which must be red in the one direction and white - in the another.

I'm not the only one, who have this problem. I noticed it in the yesterday FGUK's stream.
Airports:
5:20 - LQSA
2:07:30 - EGKK

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Re: Problem with runway lights

Postby Richard » Sun May 27, 2018 3:12 pm

Directional light points are currently not working correctly; I don't think it's specific to any given airport.

There are a number of 'changes that have affected this; most recently my fix to use points as geomety (to fix all light points on AMD 3d cards), but this may only have accentuated the problem; as directional lights have been turned off in the shader effect definition since 2015 due a problem with the definition of the direction (or something like that).

I had a brief attempt to restore the directionality by re-enabling this flag, and although it does restore a version of directional lighting the lights aren't pointing in the right direction. What I mean by this is that on approach the lights fade in and out; so it's a problem that might not be easily fixed.
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Re: Problem with runway lights

Postby Anarcho-pilot » Mon May 28, 2018 12:18 pm

So, core-developers know about this problem and trying to fix it?
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Re: Problem with runway lights

Postby Richard » Mon May 28, 2018 8:02 pm

It's been discussed - but there a possibly quite a few wrong things with the directional lighting in general that need to be fixed properly. The last build didn't work properly on AMD cards, but I think that also it wasn't actually working properly on NVidia either; and that the directionality was merely because the lights faced away from the view point; i.e. the angles of visibility weren't being correctly calculated.

Hopefully it'll get fixed in the next release - but it is a tricky issue so it might take longer.
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Re: Problem with runway lights

Postby Anarcho-pilot » Mon May 28, 2018 9:33 pm

I wish you luck with it. Hope, you'll manage to fix it till the next release. By the way, PAPI lights are displaying correctly.
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Re: Problem with runway lights  

Postby Anarcho-pilot » Fri May 22, 2020 10:57 pm

In the latest 2020.1.1 release the issue is fixed. Thank you, developers, very much!
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Re: Problem with runway lights

Postby WoodSTokk » Sat May 23, 2020 12:21 am

This problem is fixed since about 6 months. It was not only the approach light systems.
https://forum.flightgear.org/viewtopic.php?f=5&t=36288&start=60
Sometimes you see a line of yellow pulsing lights (at a runway entrance) if you leave the runway.
This is a bug in the scenery file (wrong direction of light).
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Re: Problem with runway lights

Postby Anarcho-pilot » Sat May 23, 2020 10:43 pm

Well, in the previous 2019.1.1 release, which I've been using for quite a long time, the problem, I've described here, was still present.
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