[amonith]

If you use an existing game engine all you need really is some decent Google-fu... I've been commissioned to create some non-public VR experiences for a couple of people and all I needed during development was some basic high-school vector math (like literally addition, multiplication, very occasionally a cross prodcut or a dot product which I googled by their purpose [e.g. "how to find a tangent to two vectors" or "how to check if a vector is aligned with other vector"]).

You do use that math constantly especially in shader tricks which do some visual magic based on angles between stuff but the difficulty is not in the math itself at all.