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[BUG-226762] [EEP] Sun & moon textures with transparency render on top of Linden terrain and objects #5219

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sl-service-account opened this issue Apr 14, 2019 · 2 comments

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@sl-service-account
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sl-service-account commented Apr 14, 2019

Steps To Reproduce

  • Create a sky using a sun &/or moon texture that has transparency.
    eg) In the linked "Demo Video 1", I'm using the "Jupiter" texture from the Library as the moon texture.

  • View how the sun/moon interacts with hilly Linden terrain and objects like a sim surround when the sun/moon intersects the horizon.

    Observed Behaviour

  • The sun/moon will render ontop of the terrain or objects if the sun/moon texture contains transparency.

  • Bug only reproduces when ALM is enabled. Shadows can be enabled or disabled.

  • See Demo Video 1 linked - location is viewing region Teskylation from region Testylvania Sandbox, using moon texture "Jupiter" from the Library.
    Teskylation terrain textures are all defaults from the library.
    The part of the terrain with the moon texture rendered on top is a blend of "Default Set - Base Dirt" and "Default Set - Base Grass".
    These terrain textures contain no alpha.
    It's a little difficult to reproduce at this location & you need to find the right camera angles to see it.

  • See Fig 2 attached.
    You can view this exact scene by teleporting to http://maps.secondlife.com/secondlife/Nuts%20Island/145/128/29
    Make sure the viewer is set to use the shared environment.
    Make sure draw distance is high enough to render the sim surround.
    Cam up & look how both the sun & moon render on top of the sim surround object.
    This location is very easy to reproduce at & you will see it from all camera angles.
    There is no alpha in the textures on the sim surround for the faces that have the sun & moon rendered on top of them.

  • The sky setting used is available on request.
    "BUG-226762 repro sky setting" - passed to Kyle, Alexa, Dan, Rider, Graham, Geenz.
    Moon texture used is "Jupiter" from Library.
    Sun texture is attached.

    Expected Behaviour

    The sun & moon should not render on top of the Linden terrain, sim surrounds or objects.

    Other Information

    Would it be possible to have the option of setting the sun & moon texture to alpha masking with mask cutoff setting too?

Attachments

Original Jira Fields
Field Value
Issue BUG-226762
Summary [EEP] Sun & moon textures with transparency render on top of Linden terrain and objects
Type Bug
Priority Unset
Status Closed
Resolution Accepted
Labels whirly-eep
Reporter Whirly Fizzle (whirly.fizzle)
Created at 2019-04-14T17:44:22Z
Updated at 2020-06-15T15:23:33Z
{
  'Build Id': 'unset',
  'Business Unit': ['Platform'],
  'Date of First Response': '2019-04-14T17:27:32.601-0500',
  'ReOpened Count': 0.0,
  'Severity': 'Unset',
  'System': 'SL Viewer',
  'Target Viewer Version': 'viewer-development',
  'What just happened?': 'Filling in...',
  'What were you doing when it happened?': '...',
  'What were you expecting to happen instead?': '....',
  'Where': 'Any region',
}
@sl-service-account
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Lucia Nightfire commented at 2019-04-14T22:27:33Z

Guess 15000 meters wasn't enough to avoid occlusion issues.

@sl-service-account
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Whirly Fizzle commented at 2019-04-15T17:27:00Z

Bug still reproduces on new EEP nightly Second Life Release 6.2.0.526189 (64bit)

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