Jan Sikorski (@jsikorski) commented about dlls/wined3d/utils.c:
{WINED3DFMT_B5G6R5_UNORM, VK_FORMAT_R5G6B5_UNORM_PACK16, }, {WINED3DFMT_B5G5R5A1_UNORM, VK_FORMAT_A1R5G5B5_UNORM_PACK16, }, {WINED3DFMT_B4G4R4A4_UNORM, VK_FORMAT_R4G4B4A4_UNORM_PACK16, "YZWX"},
{WINED3DFMT_DXT1, VK_FORMAT_BC1_RGBA_UNORM_BLOCK, },
{WINED3DFMT_DXT2, VK_FORMAT_BC2_UNORM_BLOCK, },
{WINED3DFMT_DXT3, VK_FORMAT_BC2_UNORM_BLOCK, },
{WINED3DFMT_DXT4, VK_FORMAT_BC2_UNORM_BLOCK, },
Should be BC3?