Hi Totek,
Thanks for the interesting question. I've made a quick attempt at this building and it certainly isn't simple! I've attached my file, but please be aware that it uses several advanced features, including:
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RCSpline > Markers to set window sizes on the nested generator, and where to place the ramped windows and the end result
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RCSpline > Banking to create the twist.
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Nested Generators to create rectangular sections that are then distributed along a linear spline
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Expressions to create the incrementing window heights.
It's parametric so you would be able to adjust window sizes, paths, twist etc. On the other hand, the style is quite complex, especially if you're new to RailClone, and you might find it easier to model this one manually.
The sample file is attached, please let me know if you have any questions.
Paul