<<1>>
> To apply any non-linear distortion to an object, you need to
> convert it into an iso_surface and apply your distortion to the
> function.
>
<<2>>
> If you have a mesh, you can apply your distortion to every point. This will
> actualy change the shape of the mesh.
>
<<3>>
> You can convert the pigment into a function to, then you can apply the
> distortion to that function.

Thanks for your response.

Option <<3>> is the one I was doing before, thanks for the other two.

But neither of the three will allow me to use pre-defined patterns such as
checker, wood, brick, hexagon, and apply a distortion to them, will they? So I
would have to re-write the code for those patterns in order to apply the
distortion to them?

Is there a way to pass a distorted <x,y,z> to those patterns? Something like
this?

  pigment {
    checker (invergence(<x,y,z>)) // Passing distorted <x,y,z> to Checker
    ...

  Steve

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