[BUG-234992] PBR Materials rotate opposite direction to blinn phong textures

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What just happened?

Created a standard color grid in a material. Rotated the material by +90 degrees using "rotation" and the texture rotates in a clockwise direction where as rotating a blinn phong texture by + 90 degrees rotates it anticlockwise

What were you doing when it happened?

Creating some standard building materials for myself

What were you expecting to happen instead?

Rotation of PBR material to match rotation of blinn phong textures

Other information

Original Jira Fields

| Field | Value | | ------------- | ------------- | | Issue | BUG-234992 | | Summary | PBR Materials rotate opposite direction to blinn phong textures | | Type | Bug | | Priority | Unset | | Status | Closed | | Resolution | Expected Behavior | | Labels | pbr | | Reporter | North Glenwalker (north.glenwalker) | | Created at | 2024-01-19T16:04:32Z | | Updated at | 2024-01-24T23:04:48Z | ``` { 'Build Id': 'unset', 'Business Unit': ['Platform'], 'Date of First Response': '2024-01-19T12:40:41.455-0600', 'ReOpened Count': 0.0, 'Severity': 'Unset', 'System': 'SL Viewer', 'Target Viewer Version': 'viewer-development', 'What just happened?': 'Created a standard color grid in a material.\r\nRotated the material by +90 degrees using "rotation" and the texture rotates in a clockwise direction where as rotating a blinn phong texture by + 90 degrees rotates it anticlockwise', 'What were you doing when it happened?': 'Creating some standard building materials for myself', 'What were you expecting to happen instead?': 'Rotation of PBR material to match rotation of blinn phong textures', 'Where': 'http://maps.secondlife.com/secondlife/Porcupine/30/201/3611', } ```

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North Glenwalker commented at 2024-01-19T16:06:05Z

Forgot to add screenshot - https://gyazo.com/3187df9dbc40555bb7890443d36f9d44

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JIRAUSER341268 commented at 2024-01-19T18:40:41Z

Hi North,

This is actually expected behaviour as the glTF materials use a different texture origin to Blinn-Phong.

More info can be found here: https://wiki.secondlife.com/wiki/PBR_Materials#:~:text=as%20of%20v7.0.1.689-,Texture%20Transforms,-With%20PBR%20materials