Render custom Line Styles as road markings, export to LumenRT

Hi all,

I've created a couple of custom line styles for road marking, to be rendered with Luxology and hopefully also exported to LumenRT.

The first problem is that the thickness of my dashed lines does not diminish as it progresses further from the camera. It seems to suddenly transition to a much thinner line at a random distance. Why is this?

I've also created a solid white line with the same thickness/ width settings as the dashed line, but it doesn't render with the correct thickness.

Here is a summary of the issues, as well as my Line Style settings.

Finally - is it still not possible to export these line styles to LumenRT? Here is an old post on the issue;