Mathematica画三维区域图

青青子衿

Mathematica画三维区域图不够光滑，是不是只能用PlotPoints进行调整？

1. RegionPlot3D[
2. 0 < x < x + y < 1 && 0 < z < y + z < 1 && 0 < x + z < 1,
3. {x, -1, 1}, {y, -1, 1}, {z, -1, 1}, PlotPoints -> 40]

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青青子衿

1. RegionPlot3D[-1 <= z <= 1 && 2 x^2 + 2 y^2 <= 4 z^2 + 1,
2. {x, -1.6, 1.6}, {y, -1.6, 1.6}, {z, -1.6, 1.6}, PlotPoints -> 50]

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