Hi all:
This is probably a real longshot but anyway, I've noticed that in most car racing games and even many other types of games, shiny objects like cars and aeroplanes are made to look like they are reflective by using a "sliding" texture that doesn't stick to the models but moves around it depending on what direction you're looking at it from. This is very easy to do in Blender ( even the game engine supports it!) but can you do it in 3DGS? DO YOU NEED PRO EDITION? like I said, it's a longshot...

For this you need a cubic envorment shader. You can find one on the wiki page or in one of the last AUM. For shader you need minimum the Com version.