https://bugs.winehq.org/show_bug.cgi?id=46779
--- Comment #15 from Nikolay Sivov bunglehead@gmail.com --- (In reply to Lorenzo Ferrillo from comment #14)
From what I can see the ID3DXEffectCompiler i still STUB, so yes the bug still is there, recent changes about d3dcompiler could remove the reliance on a native d3dcompiler dll, but I need to test this.
It has some functionality in addition to compiling things, native compiler dll won't change that.