Track not appearing correctly in RW3

[SAR704]

For some reason, RW3 is darkening the texture for my custom track. I've used 3D crafter 8.27 to build it, and used the LoftTexDiff.fx shader, which is what the docs ask you to do. Other track systems such as Scalerail show up fine.

Is there something I need to change in the source files to make them appear properly in RW3? Have any new shaders been introduced that relate to the new shadow system?

[Kali]

I can only suggest at this point in time that you open up a geo file for something that works how you want it to, and copy the material settings from that. There's a few new shaders but there's no documentation about anything yet.