f6b820ccb7
This was true for Opacity or Tint modifiers where influence vertexgroups were having an effect on strokes, but were ignored for fills. This was also the case for GPv2 / 4.2, but there is no apparent reason for not doing this on fills (if we are doing it for strokes). NOTE: it was actually in use if "Use Weight as Factor" was used (but that only means weights should be used directly, otherwise [when used as influence], weights should be multiplied). Pull Request: https://projects.blender.org/blender/blender/pulls/133306