Recap of this thread:
Railclone:
1) Instancing on - works as expected, parsing is faster, there is an issue with randomizing.
2) Instancing off- works as expected
3) Randomizing does not work when instancing is enabled - using Corona Multi Map
Jens, could you contact us about this at support@corona-renderer.com with a very simple scene demonstrating this? It could be even a scene like in your screenshots, with some boxes scattered around.
If there are some other issues with Railclone or other iToo plugins, please also report them at support@, but one issue per one separate email please.