Hi a10197,
I use FBX SDK 2019 with Qt Creator and it works fine for me, this is what I have in the .pro file, hope this helps.
win32:CONFIG(release, debug|release): LIBS += -L{your_fbx_sdk_path}/lib/vs2015/x64/release/ -llibfbxsdk
else:win32:CONFIG(debug, debug|release): LIBS += -L{your_fbx_sdk_path}/lib/vs2015/x64/debug/ -llibfbxsdk
INCLUDEPATH += {your_fbx_sdk_path}/include
DEPENDPATH += {your_fbx_sdk_path}/lib/vs2015/x64
Thanks,
Mike
Director / Technology Programmer.
Red Wasp Design & Plastic Ant Software