https://www.youtube.com/watch?v=1wXfNDkxoVk
three.js cubemap 찾아야 함.
https://www.humus.name/
에서 찾기 가능
에러 :
Uncaught TypeError: Failed to resolve module specifier "three". Relative references must start with either "/", "./", or "../"
https://66651.tistory.com/416
-> importmap으로 해결
moved to tistory. ( linked w/ the home btn below. )