Investigating
Alpha feathering occurs along clip outer boundaries with rectangular masks that extend outside the frame
- Issue: Clip edges fade away when rectangle mask is feathered.
- Steps to Reproduce:
- Apply a rectangular mask to a clip
- Move the mask to Opacity in Effect Controls
- Drag some of the points outside the edge of the frame
- Increase feather to above 0
- Expected Result: Underlying clips alpha levels should be opaque where the mask is not feathered, and fade to transparent at the boundary of the mask.
- Actual Result: The clips outer boundary is also feathered. It’s as if the mask is set to intersect with the clips boundaries, and then the feather is applied to the resulting mask
- Premiere Version: v27.0.0 (Build 88)
- Operating System: macOS, Sequoia version 15.7.1
- Chip (Mac Only): M4 Max
I understand that this behavior was introduced in v26 when Premiere’s masking architecture was overhauled. While I appreciate the new workflow, this one aspect defies logic in my use-case and I would appreciate a way to still apply masks in the way I’ve described above.
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