Compositor: some buildings dissapearing at close range

FlightGear Flight Simulator: free open-source multiplatform flight sim

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#2482 Compositor: some buildings dissapearing at close range

Milestone: 2020.3

Status: Fixed

Owner: Fernando García Liñán

Labels: None

Priority: Low

Updated: 2024-01-17

Created: 2020-12-22

Creator: v s

Private: No

Some buildings seem to disappear as the camera gets close. Shadows remain visible.

Does not happen on 2020.3.5 non-compositor (19 Dec version from http://download.flightgear.org/builds/2020.3/)

Test:

UFO at EGLL.
Compositor on windows nightly. Tested on 19 Dec & 21 Dec nightlies
Shadows were on at 8192
Buildings seem to be from Terrasync. I don't appear to have any uk custom scenery in my addon folder list apart from EGOD

Album: https://imgur.com/a/wEyYsDc

Kind regards,
vs

Discussion

Fernando García Liñán - 2020-12-31

Sorry for the late response, I missed this ticket. Will try to reproduce.

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Fernando García Liñán - 2020-12-31

status: New --> Accepted

assigned_to: Fernando García Liñán
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Megaf - 2021-01-10

Related to other LOD issues tickets?

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Fernando García Liñán - 2021-01-27

Does this still happen after FGData commit 9355d464 ?

It seems to be fixed for me.

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- v s - 2021-01-30
  
  Edit: maybe not fixed on further testing
  
  I was able to reproduce on Hawaii custom scenery at PHTO (Terrasync has deleted the old OSM2City buildings at EGLL, and currently there no buildings at EGLL on Terrasync due to sync errors with OSM2City ).
  
  There are still disappearing AC file buildings: https://imgur.com/a/ubVd9el
  
  This old AC file only scenery is rendered by model-ALS-ultra frag/vert. The instanced building vertex shader is not used here.
  
  Test:
  
  Hawaii OSM2City, next to PHTO - http://wiki.flightgear.org/Areas_populated_with_osm2city_scenery
  
  UFO
  
  Time warp from noon until shadows from buildings are distinct
  
  Windows nightly from 28th (i.e. after the shader fix)
  
  Moving slightly to parallel to buildings from the ufo will reproduce it.
  
  Kind regards,
  vs
  
  Last edit: v s 2021-01-30
  
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Megaf - 2021-01-28

Still happening here. It doesn't seem to happen everywhere, I notice with just a single object.
There's a multirole ship on the northwest of the island at SBFN that becomes invisible as we approach it.

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James Turner - 2021-01-28

Ships ansd buildings are totally different code paths for loading, so likely a related bug, but not the same cause.

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Fernando García Liñán - 2024-01-17

If it keeps happening, it seems to be unrelated to the Compositor. Could not reproduce in 2024, so closing for now.

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Fernando García Liñán - 2024-01-17

status: Accepted --> Fixed
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