When I first launched “Phantasy Star Online: Blue Burst” – more specifically, the client provided by the Ephinea private server – on wine, it worked fine, but with one minor error:
the transparent scrolling textures that the game often uses to display computer monitors were invisible (see screenshots here).
I tried using different versions of Wine, different settings in Lutris, and more to no avail, until I discovered this thread on the Ephinea forums. It describes a utility called “dgVoodoo” that can rewire an old Direct3D 8/9 program to use the APIs of DirectX 11. Given that, in current versions of Wine, most effort is being spent on DirectX 11, trying it out seemed like a good idea.
However, when I first installed it, it resulted in an even worse outcome – the game launched with a permanent black screen instead of the graphics. Luckily enough, it turned out that the solution to that was even simpler: to turn on the “Enable DXVK/VKD3D” option in Lutris' settings for the game. After this, the game ran perfectly, and the previously-missing textures returned (see this excited tweet for a screenshot with confirmation).