Question: parametric solid in implicitplot3d

hello, I make some code about NURBS.

Till NURBS curve and surface I did. These shapes are came from parametric equation.

Nurbs curve is...

plot([F(t),G(t),t=0..1]);

 

and NURBS surface is

plot3d([F(t,p),G(t,p),R(t,p)],t=0..1,p=0..1);

 

so I tried to make solid also by using 'implicitplot3d'.

 

But it does not support parametirc equation.

For example, implicitplot3d([F(t,p,s),G(t,p,s),R(t,p,s)],t=0..1,p=0..1,s=0..1);

But It doesn't work.

 

Any idea?? or another possible way to make solid??

 

thanks and have nice day.

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