Thanks for your questions. Please find a style attached that illustrates how a style like this might be created and answers to your queries below.
how do I do that without Railclone changing the length of my carriages ?? (or changing the length of anything for that matter)
In the attached style I have suggested using a Sequence operator to construct the train. To stop the sequence from repeating and so adding train sections along the full length of the track, just add a segment with no geometry applied to the final input slot. RailClone will stop generating objects when it hits this point. I've also exported the carriage's counter property so you can easily adjust the length of the train.
To prevent objects from deforming you can turn off Bend
in the segment's properties, though V-Ray proxies cannot be deformed and so this shouldn't be necessary.
My 2nd issue is that when I render my objects do not have their materials ? I am using VRay Proxies but they definitely do have had their materials assigned.
RailClone does not automatically consolidate materials and reassign IDs like Forest Pack does. You will need to generator a material that works when applied to the RailClone object and the V-Ray proxies. Please see the 12th rule in this chapter of our "Next Steps with RailClone"
guide for more info.
My 3rd question relates to the size of models used as segments.
You are free to work with proxies in RailClone but there's no advantage to doing so as the plugin generates instances from geometry on the fly. In fact proxies have some limitations for example as mentioned they cannot be deformed.
RailClone should be able to handle very high polygon counts as it is highly optimised to work with detailed meshes. So I'm not sure what the problem is here. If you'd like to send us the scene so we can take a closer look at it, please send to firstname.lastname@example.org
. Otherwise we can recommend using the actual geometry instead of proxy objects.
I hope that helps, please let me know if you have further questions.