Graphics3D[{Polygon[{{-2.0123*^-16, 3., -0.8165}, {0.86603, 2.5, -0.8165}, {0.57735, 3., -1.633}}], Polygon[{{-2.0123*^-16, 3., -0.8165}, {0.57735, 3., -1.633}, {-0.28868, 2.5, -1.633}}], Polygon[{{-0.28868, 2.5, -1.633}, {0.57735, 3., -1.633}, {0.57735, 2., -1.633}}], Polygon[{{0.57735, 3., -1.633}, {0.86603, 2.5, -0.8165}, {0.57735, 2., -1.633}}], Polygon[{{-2.0123*^-16, 3., -0.8165}, {-0.28868, 2.5, -1.633}, {-3.8164*^-17, 2., -0.8165}}], Polygon[{{-0.28868, 2.5, -1.633}, {0.57735, 2., -1.633}, {-3.8164*^-17, 2., -0.8165}}], Polygon[{{-3.8164*^-17, 2., -0.8165}, {0.57735, 2., -1.633}, {0.86603, 2.5, -0.8165}}], Polygon[{{-3.8164*^-17, 2., -0.8165}, {0.86603, 2.5, -0.8165}, {-2.0123*^-16, 3., -0.8165}}]}, {LightSources -> {{{1., 0., 1.}, RGBColor[1., 0, 0]}, {{1., 1., 1.}, RGBColor[0, 1., 0]}, {{0., 1., 1.}, RGBColor[0, 0, 1.]}, {{-1., -1., -1.}, RGBColor[0.5, 0.5, 0.5]}}, Boxed -> False, PlotRange -> {{-0.31754, 0.89489}, {1.975, 3.025}, {-1.6534, -0.79608}}}]