There is an invisibility issue that I guess has occurred after recent using metin2 official patches
Sample
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Problem is that the models that go outside the view frustum are hidden but do not appear when returning inside
Look for it
Eterlib\CullingManager.cpp -> void CCullingManager::VisibilityCallback(const Frustum &/*f*/,SpherePack *sphere,ViewState state)
When we remove the hide and show methods in this function, the problem is solved, however, the problem of high gpu usage occurs, because we disable view frustum
This changes solves the problem in the following post
I need your ideas to solve this problem I have been working on it for a long time but there is something I overlooked and I cannot find it