Opacity modifier can also change hardness. It was creating the curve "hardness" attribute but using the default zero value. Hardness should be 1.0 by default. Pull Request: https://projects.blender.org/blender/blender/pulls/118000
Opacity modifier can also change hardness. It was creating the curve "hardness" attribute but using the default zero value. Hardness should be 1.0 by default. Pull Request: https://projects.blender.org/blender/blender/pulls/118000