CentrSvet / Centrsvet Track Slim System
Models –
WAGGON 15 TURN 05.150.30 B
WAGGON 15 TURN 10.300.30 B
WAGGON 15 LINE 20.600.30 B
+ Magnetic track system RELSA F15

On fbx impose smoothing for tasks (the rail does not need smoothing)
For Corona render it is recommended to install a version not lower than 1.5 since the glossiness of materials is adjusted to fit PBR.
Corona render 2.0 version

Other models in my profile are https://3dsky.org/users/evdokimov2209/models