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Suggestions for improvement: I would look for some angled torches and is the chain floating? I also believe you can find models of stairs here at hive, if you want a more fluent stairway.

x.x
so that means that I'm just wasting my time that I created that stairs (it's so hard to make that stair T.T)
there is a table that holds the chain, it's just unseen in the current picture. and the torchs are not angled. I just changed their height z.. thnks for advice

Well you can use the stair, but then I would add something to it, like a railing.