> "joe" <nomail@nomail> wrote:
>> I've built a soda bottle with a bezier_spline lathe object.  It's clear glass,
>> hollow and has a wall thickness.  To fill the bottle with soda I am creating
>> another lathe object inside the bottle.  To prevent a coincident surface problem
>> should I scale the soda larger to push the soda into the bottle wall?  Any
>> better ways to fill a bottle with fluid?
>
>
> Have you tried using csg merge? This prevents surface interference between
> transparent objects, you could overlap the boundaries slightly and use merge to
> remove the overlap.
>
>
>
Not realy advisable as it will remove both surfaces and you need to keep 
one.

A possibility is to use an union of incomplete shapes:
- The container, including the inner surfaces except where the content 
is present. Have it's own interior.
- The bottom of the content, with an intermediate ior and appropriate 
interior.
- The surface of the content using a disk or any other single faced 
object. Have the same interior as the content and the proper ior.



Alain

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