I will do some testing for the save game compatibility, but I don't expect any problems there. as <a contenteditable="false" data-ipshover="" data-ipshover-target="<___base_url___>/index.php?/profile/3183-ketchup/&do=hovercard" data-mentionid="3183" href="<___base_url___>/index.php?/profile/3183-ketchup/">@Ketchup</a> correctly points out, the new herb meshes should just slowly replace the old one as they die and regrow.
<a contenteditable="false" data-ipshover="" data-ipshover-target="<___base_url___>/index.php?/profile/2413-elemental/&do=hovercard" data-mentionid="2413" href="<___base_url___>/index.php?/profile/2413-elemental/">@elemental</a> as for compatibility with the Cold Realism mod, I think that is very unlikely unfortunately. It also seems that the original developer of that mod has stopped working on it a long time ago, so asking him for help in making a compatible version would not be possible.
One thing I could do however, is to add a similar mechanic to Natural Diversity (this is one of the reasons why I'm thinking about 2 versions of the mod). One thing I personally didn't like about the Cold Realism mod is that it kills all plants regardless of wether they would normally survive the winter or not (e.g. it's actually not that realistic). The herbs I've made so far are all perennials, meaning that they would survive most winters in real life. If I would add some annual herbs, which would die each winter, I think this could create a pretty interesting mechanic. The annual herbs would for example die as soon as the temperature goes below 0C, but the perennials would only die if the temperature drops below -10C. This would mean that in mosts winters you would be left with only half the herbs available, while a very cold winter would leave you with none at all. How often the latter occurs then ofcourse depends on your climate setting. I would then add a similar mechanic to all organic resources, depending on what's realistic. Mushrooms for example would always disappear in winter, while most berry bushes would only die under very extreme conditions.
