I add texture layer and I can clip texture to match underlying stroke object by clicking mask layer icon in the layer properties section.
There is an example in this video.
I can do this in Blender 2.80 and 2.82 but can't make it work in 2.83 (and 2.90).
Images before and after masking are below. Is this feature removed in 2.83 or am I missing something?