Built-in Unmult leaves residual alpha instead of producing fully transparent pixels.
- Issue
- Built-in Unmult leaves residual alpha instead of producing fully transparent pixels.
- Steps to reproduce
- Create a composition.
- Import footage with a black background.
- Apply the built-in Unmult effect.
- Inspect the alpha channel.
- Expected result
- The alpha value should become 0 in transparent areas.
- Actual result
- A residual alpha value remains (equivalent to 1 in 8-bit). The issue also occurs in 16 bpc projects.
- Environment
- After Effects 26.0
- Windows 11
- Additional information
- This issue does not occur with third-party Unmult plugins such as Knoll Unmult or Red Giant Unmult.
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