[BUG-233854] No shadow casting on alpha blending materials from projector light (reopened)

[sl-service-account]

What just happened?

Projector lights do not cast a shadow on or through alpha blended materials. Shadows cast appropriately with alpha masking and emissive mask.

What were you doing when it happened?

Posing for a portrait with projector lights at my avatar. Wearing a sweater with alpha blending (texture is a torn sweater) which ends up creating a shadow that shows through the areas alpha's out on the Legacy body.

What were you expecting to happen instead?

I expected the shadow to reflect the shape of the full sweater and hide the areas covered by the sweater mesh.

Other information

See attached screenshots; also see JIRA https://jira.secondlife.com/browse/BUG-232860

Attachments

• shadows with alpha blending.png 2023-05-09 18:07:13
• shadows with alpha masking.png 2023-05-09 18:07:14
• shadows with emissive mask.png 2023-05-09 18:07:13

Links

Related

• [ ] https://github.com/secondlife/jira-archive/issues/10048
• [ ] https://github.com/secondlife/jira-archive/issues/5796

Original Jira Fields

| Field | Value | | ------------- | ------------- | | Issue | BUG-233854 | | Summary | No shadow casting on alpha blending materials from projector light (reopened) | | Type | Bug | | Priority | Unset | | Status | Accepted | | Resolution | Triaged | | Created at | 2023-05-09T22:07:18Z | | Updated at | 2023-05-10T17:27:55Z | ``` { 'Build Id': 'unset', 'Business Unit': ['Platform'], 'Date of First Response': '2023-05-10T12:27:55.555-0500', "Is there anything you'd like to add?": 'See attached screenshots; also see JIRA https://jira.secondlife.com/browse/BUG-232860', 'ReOpened Count': 0.0, 'Severity': 'Unset', 'System': 'SL Viewer', 'Target Viewer Version': 'viewer-development', 'What just happened?': 'Projector lights do not cast a shadow on or through alpha blended materials. Shadows cast appropriately with alpha masking and emissive mask.', 'What were you doing when it happened?': "Posing for a portrait with projector lights at my avatar. Wearing a sweater with alpha blending (texture is a torn sweater) which ends up creating a shadow that shows through the areas alpha's out on the Legacy body.", 'What were you expecting to happen instead?': 'I expected the shadow to reflect the shape of the full sweater and hide the areas covered by the sweater mesh.', 'Where': 'http://maps.secondlife.com/secondlife/Flying%20Coyote/80/172/3001', } ```

[sl-service-account]

Dan Linden commented at 2023-05-10T17:27:56Z

Thank you for the report, Mercy!