Hi @yaswanth,
What is the best and precise way to implement multiplayer 3D game?
It all depends on your requirements, I would personally recommend socket.io, although Colyseus is very nice as well
Multiplayer Demo - Using Colyseus Multiplayer Gaming Framework - #4 by Lahiru_Pathirage
How can we load avatars at run time and what could be the best platform to load them into our scene?
At the moment, readyplayerme is the best service available for that, you might be able to use Snapchat’s bitmojis but it is a bit restricted service.
How can we implement voice chat for avatars in-terms of lipsync and hand movements animations etc…
For voice/video chat, I would recommend Agora SDK Agora Real-Time Voice and Video Engagement,
For avatar movement and lip syncing, @yaustar was doing some experiments, you can check them out here:
https://twitter.com/yaustar/status/1496918844874575874