Travis, the work you're doing on these bridge components is inspirational! I see many bridges using various combinations of concrete/steel-beam spans/piers like yours in my area. I especially like the walkways you've added.
In a route that I've been experimenting with lately, I often end up covering whatever the bridge shape uses for a deck surface (either solid or open deck) with my own bridge track texture. This lets me control whether the span is ballasted or open deck. My open deck track texture is still solid, but has dark shadows between the ties. I add dummy rail shapes for the guard rails on the bridge sections that need them, and the result looks like this in the sim:
bridge-tie-detail.jpg
If you have to compromise, modeling a solid surface on your open deck spans and texturing in the shadows could help alleviate those white gaps in the ORTS rendering. Just a thought
- Matt