wgpu's default DX12 shader compiler loads whichever dxcompiler.dll the
DLL search path finds first; VectorCraft ships none, so it was another
program's, and one without its dxil.dll warns that the DXIL is unsigned.
wgpu takes the warning for a compile error, the device is lost before
the first frame, and the app falls back to OpenGL. FXC (d3dcompiler_47,
part of Windows) compiles everything the window needs, as LightCraft
does since its #484; WGPU_DX12_COMPILER still picks another.
bflatastic
21459f4df4