Sequence Editor
Code in 'seq_render_mask' will effectively do
BKE_mask_evaluate(mask_temp, mask->sfra + (cfra - fra_offset), true)
where 'fra_offset' is zero for absolute and seq->start for relative.
If we really want the scene's current frame (as advertised) if Mask Time
is set to Absolute (effectively ignoring the Mask Settings start/end) we
need to change the fra_offset from zero to mask->sfra.
Also BKE_animsys_evaluate_animdata should take mask->sfra into account
as well (otherwise mask animation [points] and other animation [e.g.
opacity] will run out of sync)
Reviewers: campbellbarton, ISS
Maniphest Tasks: T68700
Differential Revision: https://developer.blender.org/D5495
b77da65e8c