The racer I made before, imported in Unreal just for fun:

Sci-fi arch model:

Sci-fi Arch by mgonth on Sketchfab

Working on an arch prop for sci-fi racing game:

I made a jet propulsion effect for the racer vehicle. Its got particles, animation and plenty of emissive :D

New sci-fi racer I've been working on:

Racer02 by mgonth on Sketchfab

Another way to make a simple reflected gradient: