@David.G said:

I think what @JKSH is referring to is -opengl dynamic

That's right.

which is what I'm also using in my windows builds since it's pretty convenient.

The official builds of Qt 5.5 use it too. The OP doesn't need to create a custom build; just download and install.

You can read more on it here: http://doc.qt.io/qt-5/windows-requirements.html#dynamically-loading-graphics-drivers

Thanks for the link!