Ron Parker wrote:
> 
> Careful what you call a bug.  You seem to be concerned that POV-Ray does
> something unrealistic when you present it with a situation that cannot
> exist
> in reality.  Why is this a problem?
> 

I called it a bug because ior has been moved from finish to interior 
because ior has to be constant in the whole object to prevent that a ray 
enters at one ior and leaves at a different one. But when two object of 
different ior are merged / intersected exactly the same thing happens. 

I see now that overlaping of transparent object in union cannot be checked 
at parsing time and checking it during rendering would things slow down. 
But in the case of merge/intersection a warning at parsing time could be 
issued.

- Micha

-- 
http://objects.povworld.org - the POV-Ray Objects Collection

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