Hello FreeType team, I am writing to you to discuss about a problem I meet during use FT_Library_SetLcdFilter when FT_CONFIG_OPTION_SUBPIXEL_RENDERING is being defined in "freetype/config/ftoption.h". I am using IMGUI with FreeType to render and in platform of DirectX 9 and win32. I am trying to render the font as "D3DXCreateFont(m_Device, 12, 0, 0, 0, 0, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLEARTYPE_NATURAL_QUALITY, DEFAULT_PITCH, TEXT("Verdana"), &Fonts::Verdana);". So, I modified Uncomment #define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in "freetype/config/ftoption.h". Also took the file of "imgui_freetype.h/cpp" from https://github.com/loicmolinari/imgui/tree/freetype-subpixel which has support in platform opengl3. I did adapt the code to able compile with IMGUI in version 1.91b and compile with Freetype in vcpkg install freetype:x86-windows. The FT_Library_SetLcdFilter function is keeping return 0x7 which is "Unimplemented_Feature". I am looking forward to have your replied. Best wishes.