I can not build Qt3D by QtCreator on Windows7. qmake.exe worked without a error, but jom.exe reported "Qt3D/qglpainter.h: No such file or directory" for linies look like as "#include <Qt3D/qglpainter.h>". I understood that value of Qt3D isn't correct. I don't know where I can setup the variable. I am beginner at Qt and I am confused by a quantity tune files. Please help me!