Railworks America

Hello Guys,
I am in big problem.
I have created a track, its rails texture is dark after export the track.
If i will test the track assets editor it will shot real texture.
please check the image below. I am unable to understand the problem.

Please help me

It could be due to 2 primary things, in-game lighting (shadow effects) and alpha problems.

I have tested with Alpha & Non-Alpha texture.
Before it was working like assets editor, but now idk what happened.
I have also tested in TS 2015, 2016 & 2017 same result