There's no limitation. Feel free to test anything you want in SunFlow from a plug-in or a derived version of Sweet Home 3D.
Some classes of SunFlow project are missing in lib/sunflow-0.07.3i.jar but I don't think they are related to the features you mentioned. Anyway it shouldn't be difficult to rebuild a full version of SunFlow by removing <exclude> elements found in buildForSweetHome3D.xml entry of sunflow-0.07.3i-src-diff.zip found in source code. This file contains the modifications I introduced in SunFlow to fix some bugs and add support for missing features.
Good luck!
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Emmanuel Puybaret, Sweet Home 3D creator
