Add durability of 6 to Stone, and possibly 3-4 to Dirt , because, of 2 main reasons.

1.Terrain regeneration around sieged towns is basically essential now, but in my opinion,it takes away immersion and feeling of impact of your deeds to the world around you, it feels much more significant and better if you can tell which place was a battlefield if you come across it, or if you see holes from distant shots you made while trying to kill enemy tanks shooting at you at max range, simply feels more immersive and "Real" if terrain doesnt just magically regenerate. with durability change to natural blocks, terrain damage wouldnt be so significant that regeneration is absolutely essential

2. while nerfs to underground tanks and cannons made them less opressive, they are still a broken game mechanic that can be used to some extent and was attempted at recent sieges i have been to, adding more durability to naturally occuring stone would help in making it even more obsolete and wouldnt cause any balance issues as stone is simply just as expensive to get as stone bricks which already have the increased durability.

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