It’s good that you managed to compile VTK, but you are restricted to 32-bit binaries with MinGW. MinGW64, despite its name, is a different project and, thus, a different toolset. Alternatively, you can try Visual Studio Community to have 64-bit capability in Windows. With 32-bit, you may run into problems if your project grows by including certain header-only libraries like Boost, Eigen and ExpressTK, as they tend to result in too many symbols in your program, especially in Debug mode. 32-bit programs are also prone to memory fragmentation which is more likely as your scene grows in complexity.