Graphics3D[primitives, options]See Drawing Option and Option Values for a list of Plot options.
Graphics3D[Polygon[{{0,0,0}, {0,1,1}, {1,0,0}}]]
The Background option allows to set the color of the background:
Graphics3D[Sphere[], Background->RGBColor[.6, .7, 1.]]
In TeXForm, Graphics3D creates Asymptote figures:
Graphics3D[Sphere[]] // TeXForm