Alright, with much time and an extensive amout of google search I managed to cobble a working QOpenGLWidget program together. I used this official Qt-Example as a basline: http://doc.qt.io/qt-5/qtopengl-cube-example.html here is the combination with my Tesseract code https://github.com/DeiVadder/Tesseract-Challenge-OpenGL It's working, yeah me!!, but I have the feeling that it's far from ideal. I'm just glad I managed to draw something in 3d. Anyway, closed and solved.