> I'm not exactly sure what you are saying with that bit of script

I'm thinking I misunderstood you.  I took what you said to imply
I'd have a problem with the light trail if it already existed even
though it had no texture because it would be intersecting my bike.
So my test was to see what a textureless sphere would do to the
box.  Think of the sphere as a simple trail and the box as my bike.

> but what I was trying to warn of has to do with how a texture
> pattern will interact with corners/turns as it moves along the path
> line.
>
> It might be easier to show an example of what I'm thinking about
> rather than just describe it, so I've posted a sample script at
> povray.text.scene-files which will animate.
>
> I think the idea must be to prevent interaction with a perpendicular
> section of the path. Probably solvable, but I haven't gone into that.
>
> Bob H.

Thank you so much for the code.  I need to digest the code to see
what you are doing but I like it.

Thanks,
Carl

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