TinCanMan wrote:
>"Christopher James Huff" <chr### [at] maccom> wrote in message
>news:chr### [at] netplexaussieorg...
>> In article <web.3df51889472923f770499b5a0[at]news.povray.org>,
>>  "Arlon Meisner" <ame### [at] comcastnet> wrote:
>>
>> > I want to round over an edge of a box. I have tried the "Round_Box_* "
>macro
>> > but it rounds all edges. The z box-edge length is less then x and y. The
>z
>> > box-edges are those that I want rounded to a given radius.
>>
>> Do it the same way the macros do it, with CSG. If you only want the
>> edges along the z axis rounded, a union of 2 boxes and 4 cylinders
>> should be sufficient.
>
>+two planes differenced if you want true smooth surfaces and no coincidient
>surfaces.
>
>-tgq
>

i don't understand what coincidient surfaces are... what can be a problem if
you don't difference two planes?
i guess it's about pov who don't know what surface to take while rendering.
the surface from box1 or box2. am i right?

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