I was looking to upgrade the three js which is used in autodesk forge behind the scene and reason for upgrade is I am trying to use this library and this need three js r71 and above and inside forge viewer it seems they are using r33.I found a blog where it showed me how can I take the advantage of later three js.I followed it but seems like its not working.There forge viewer now have 2 references of three js and it gets confused which one to use and hence some of code behave weird
Alternatively, if you don't mind sharing a live link to your app or your Forge app config, please send us an email to forge (dot) help (at) autodesk (dot) com, and we'll investigate the issue from our end.