I could reproduce this bug in r1477 on standard route with standard rolling stock as well.
1. Create new registry key of type DWORD and set its value to 1: HKEY_CURRENT_USER\Software\OpenRails\ORTS\ShadowAllShapes
2. Start OR, and select route Northeast Corridor, activity Summer Express
3. When game started, go to camera 3
4. Zoom out with PageDown key till it is possible.
Now the weird shadow gets visible. You can also try rotating around to see it moving.
I could reproduce this bug in r1477 on standard route with standard rolling stock as well.
1. Create new registry key of type DWORD and set its value to 1: HKEY_CURRENT_ USER\Software\ OpenRails\ ORTS\ShadowAllS hapes
2. Start OR, and select route Northeast Corridor, activity Summer Express
3. When game started, go to camera 3
4. Zoom out with PageDown key till it is possible.
Now the weird shadow gets visible. You can also try rotating around to see it moving.