Differential D4371
The various color blend mode, like Screen, Multipley, Lighten, etc Do not use the correct Alpha channel Authored by John Quillan (jquillan) on Feb 19 2019, 10:24 AM.
Details I notices when using the VSE to apply some footage that was shot against a black background and meant to be blended in with Screen, had weird behavior in regards to its alpha channel, essentially clipping what was below it and showing transparency. This is a problem when you are taking that footage and transforming it, and using Screen blend mode on the transform layer. I am not sure where I should put a screen shot that illustrates this bug?
Diff Detail
Event TimelineComment Actions Please create Bug report with example blend file. Also I am not familiar with this blend mode, can we agree on definition below? Comment Actions I created a bug report https://developer.blender.org/T61733 and attached a simple blend file with it. https://en.wikipedia.org/wiki/Blend_modes#Screen is correct, but keep in mind this covers other blend modes that were added in commit 4b4702a (I thought I noted this, but apperantly not). Comment Actions I misunderstood "clipping alpha channel" so i expected problems in math... |
