实体物件
实体是一个封闭的曲面或多重曲面，无论何时，只要曲面或多重曲面能够形成完全封闭的空间就可以构成实体。Rhino 可以建立单一曲面实体、多重曲面实体以及挤出物件实体。
建立单一曲面实体
单一曲面可以将其自身环绕包裹组合在一起，例如球体, 环状体, 和椭球体，打开这些单一曲面的控制点，可以修改曲面的形态。
Ellipsoid
Draw a solid ellipsoid.
Sphere
Draw a solid sphere.
SphereTangentToThreeSurfaces
Create a spherical surface of a given radius tangent to the three selected surfaces.
Torus
Draw a NURBS torus (donut shape).
建立多重曲面实体
有一些可以创建多重曲面实体的 Rhino 指令，多重曲面是由两个或以上曲面组合而成的，当多重曲面包裹形成一个封闭空间以后它就是实体。例如 Pyramid, Cone 以及 Truncated Cone 等指令都可以生成多重曲面实体。
SolidPtOn 指令可以打开多重曲面的掣点，掣点与控制点类似。
Box
Draw a solid box.
Cone
Creates a surface cone.
Cylinder
Draw a polysurface cylinder.
Paraboloid
Draw a parabolic surface or capped solid.
Pyramid
Draw a pyramid.
TruncatedCone
Draw a NURBS truncated cone.
TruncatedPyramid
Draw a pyramid whose apex is truncated by a plane.
Tube
Draw a closed cylinder with a concentric cylindrical hole.
从曲线或曲面建立实体
Boss
Extrude closed planar curves normal to the curve plane toward a boundary surface where the boundary surface is trimmed and joined to the extruded objects.
ExtrudeCrv
Drive closed planar curves in a straight line.
ExtrudeSrf
Drive surface edges in a straight line to create a solid.
Pipe
Create a surface, polysurface, or extrusion object with a circular profile around a curve.
Rib
Extrude a curve in two directions to a boundary surface.
Slab
Offset a polyline, and extrude and cap the result to create a solid.