When exporting to a vector format (e.g. PDF or SVG) or when a line subsymbol has dynamic (data defined) properties, we now automatically switch to a line-by-line based approach to render the fill. (Previously, a tiled pattern approach was always used, which often resulted in undesirable artefacts and visible seams in the pattern).
Some of the many benefits of this change include:
And even more excitingly, it opens the door for a range of new symbol styles, for example: