Here's a custom renderer for viewing the railway network

[A Thompson]

If you're in an unknown place, it' can be useful to understand the rail network around you. OsmAnd can show online tiles from OpenRailwayMap (Configure Map > Map Source > Install more...) but we already have the data in our offline map. I noticed that the inbuilt "Topo" renderer does a good job of showing railways at different zoom levels, but they get obscured by roads, e.g. :

So I wrote a little renderer (attached) that extends Topo, adding two more entries to its "Hide" menu:

The first hides roads, the second hides railways that aren't for everyday transport (preserved, abandoned, disused, construction, miniature). [Can anyone think of a better name than "Non-service rail" for the latter?] This gives a clear view:

Even better, if you combine this with a custom POI search, Search > Categories > Custom search (at the bottom) > Transportation > Railway station + Railway stop (you can save this with a name for future use), you get this:

To use, put the rail.render.xml file into the the "rendering" subfolder of your OsmAnd installation, completely restart OsmAnd, and pick "rail" in Configure map > Map style. The extra hiding  options are only available while "rail" is selected, and deleting the .xml file removes any trace.

Just sharing something I find useful - I hope someone else likes it!