[BUG-9662] Blended alpha textures are not lit by ambient light from projectors

[sl-service-account]

Steps to Reproduce

Rez mesh with alpha texture applied to at least one face, set to blend. Create a projector light source and aim at object. Adjust ambient light and move it around.

Actual Behavior

Under the Advanced Lighting Model, blended alpha textures appear only to be lit properly by initial projected light, rather than both the projected light and ambiance. Please refer to the attached graphics for an example.

Expected Behavior

Ambient light should affect transparent textures the same way it affects solid textures. Textures using the masking method are rendered properly, however this negatively affects bump rendering.

Other information

This is noticeable whether the item is rigged or un-rigged.

Attachments

• BlendTexture-AmbientLightIssue-1.jpg 2015-07-12 15:43:07
• BlendTexture-AmbientLightIssue-2-unrigged.jpg 2015-07-12 15:43:07

Links

Duplicates

• [BUG-5852] Projected light with high Ambiance setting causes textures containing transparency to render too dark. #13762

Original Jira Fields

Field	Value
Issue	BUG-9662
Summary	Blended alpha textures are not lit by ambient light from projectors
Type	Bug
Priority	Unset
Status	Closed
Resolution	Duplicate
Reporter	ShearStreet (shearstreet)
Created at	2015-07-12T19:43:07Z
Updated at	2015-07-17T22:34:10Z

{
  'Business Unit': ['Platform'],
  'Date of First Response': '2015-07-12T15:33:20.537-0500',
  "Is there anything you'd like to add?": 'This is noticeable whether the item is rigged or un-rigged. ',
  'Severity': 'Unset',
  'System': 'SL Viewer',
  'Target Viewer Version': 'viewer-development',
  'What just happened?': 'Under the Advanced Lighting Model, blended alpha textures appear only to be lit properly by initial projected light, rather than both the projected light *and* ambiance. Please refer to the attached graphics for an example.',
  'What were you doing when it happened?': "setting up lighting in new home, noticed unexpected dark pieces in a hair mesh I'm working on. ",
  'What were you expecting to happen instead?': 'Ambient light should affect transparent textures the same way it affects solid textures. Textures using the masking method are rendered properly, however this negatively affects bump rendering. ',
}

[sl-service-account]

ObviousAltIsObvious commented at 2015-07-12T20:33:21Z

Probably related to SH-2638

[sl-service-account]

Whirly Fizzle commented at 2015-07-13T01:05:26Z

I think this is BUG-5852 ?

[sl-service-account]

Kyle Linden commented at 2015-07-17T22:34:10Z

Definitely duplicates BUG-5852