Manual testing - rigged-simple not rendering object

In the manual test rigged-simple, an object is meant to appear for the user to see, but nothing other than the background is displayed in the application. This can be fixed if you change the 3D renderer from rhi to opengl by modifying the environment variable QT3D_RENDERER, thus including this line in main.cpp:

• qputenv("QT3D_RENDERER", "opengl")

After including this line, the object will appear.