Why does zbrush drag and rotate very badly, but carving is not
My cpu is amd3900x, my graphics card is rtx3080, with 64g memory and 4k display.
I want to know what caused this phenomenon
Hello @wenyuan60
There’s not really enough information here to do anything more than make some wild guesses.
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You might be working with a very dense mesh with no lower subdivision levels to preview when navigating.
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You may have a feature like Dynamic Subdivision active on a high rez mesh which will slow performance.
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You might be experiencing some variety of this issue.
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Some other system-specific issue.
In order to investigate this issue, you would need to provide more information. Please go to Pixologic Support, and start a conversation there.
Thank you! 
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