Tableau doesn’t support 3d graphs because they aren’t consistent with best practices for presenting data in a way that it can be accurately understood. Studies have shown that 3D Charts are less accurate than other visualization types, and Tableau has a strong bias towards accuracy in presentation. No one finds 3D bars, 3D pies etc. analytically useful. On the contrary they make the charts harder to read with no real benefit. So many Viz Gurus advised not to use 3D charts in tableau.
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