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[BUG-226024] [EEP] Alpha blended textures render black when ALM is enabled #4668

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sl-service-account opened this issue Dec 28, 2018 · 1 comment
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@sl-service-account
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sl-service-account commented Dec 28, 2018

Steps To Reproduce

  • Login on the EEP viewer to a region running on Snack.

  • Examine how alpha blended textures render at different camera angles when ALM is both enabled & disabled.

  • Bug reproduces with any sky environment - for example you can test with World -> Environment -> Midday.

    Observed Behaviour

  • On the EEP viewer, when ALM is enabled, alpha blended textures will render mostly black at certain (most) camera angles.

  • On the EEP viewer, when ALM is disabled, alpha blended textures render as expected & they match how alpha blended textures look on legacy viewers when ALM is both enabled & disabled.

  • This bug does not reproduce for alpha masked textures.

    See attached images:

  • 2 default boxes with texure bb839549-6011-6040-c809-34af2bb6bea2, one set to alpha blended & one set to alpha masked.
    Sun set to midday, water on default on both EEP & Legacy.

    • Fig 1 - Legacy viewer, ALM enabled - renders as expected.
    • Fig 2 - Legacy viewer, ALM disabled - renders as expected.
    • Fig 3 - EEP viewer, ALM enabled - the alpha blended texture renders much too dark.
    • Fig 4 - EEP viewer, ALM disabled - alpha blend & mask match in shading at the same camera angle but the blended texture is still affected by the sun direction, just not as severely as when ALM is enabled.
  • Alpha blended eyebrows on my mesh head, alpha blended tattoo on my mesh body & alpha blended hairbase.
    Sun set to midday, water on default on both EEP & legacy.

    • Fig 5 - Legacy viewer, ALM enabled - renders as expected.

    • Fig 6 - Legacy viewer, ALM disabled - renders as expected.

    • Fig 7 - EEP viewer, ALM enabled - WTF happened to my eyebrows! Hair base side is black, freckles on tattoo are much too dark.

    • Fig 8 - EEP viewer, ALM disabled - Alpha blended textures render @Correctly@ but the shading is really ugly on everything if you compare it to the legacy viewer when ALM is disabled.

      Expected Behaviour

  • The EEP viewer should render alpha blended textures correctly when ALM is enabled.

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Original Jira Fields
Field Value
Issue BUG-226024
Summary [EEP] Alpha blended textures render black when ALM is enabled
Type Bug
Priority Unset
Status Closed
Resolution Accepted
Labels whirly-eep
Reporter Whirly Fizzle (whirly.fizzle)
Created at 2018-12-28T23:00:08Z
Updated at 2020-06-15T15:23:30Z
{
  'Build Id': 'unset',
  'Business Unit': ['Platform'],
  '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': 'http://maps.secondlife.com/secondlife/Testylvania%20Sandbox/88/96/22',
}
@sl-service-account
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Whirly Fizzle commented at 2018-12-29T00:00:20Z

Gif showing just how bad this is, as the static images don't do it justice.
Toggling ALM on EEP.

https://gyazo.com/f0b8de30f1aac226151d92978df5d363 - eyebrows & hairbase.

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