On 19/08/2017 12:09, Sven Littkowski wrote:
> On 19.08.2017 04:23, Stephen wrote:
>> On 19/08/2017 07:04, Sven Littkowski wrote:
>>> Intention:
>>>
>>> Using the "Difference" function to create caves and tunnels inside a
>>> square-shaped piece of Martian surface (a hollow mesh object).
>>>
>>> What are your solutions, to transfer what is now a mesh, into a solid
>>> object. I believe these objects need to be solid, in order to create
>>> caves and tunnels through Difference into that body.
>>>
>>
>>
>> You are thinking about it wrongly.
>> There are no solid mesh objects. The keyword "hollow" has nothing to do
>> with an object not being solid. It is used for media containers.
>> You should think in terms of the mesh not having any holes. Then you can
>> use it with csg without artefacts. In the animation below I intersected
>> the mesh of Ariel (the ghost) was intersected with a cub then filled
>> with media. The hollow keyword was used for that.
>>
>> http://www.tc-rtc.co.uk/member/imagenewdisplay/index176.html
>>
>> When I was creating the df3s for Dhalgren with Thomas. I had a lot of
>> trouble with the meshes when they had holes in them. (I had to manually
>> edit the slices that make up the image sequence.)
>>
>>
http://news.povray.org/povray.binaries.images/thread/%3C58343a6a@news.povray.org%3E/
>>
>>
>>
>>
> Thanks. The first link requires a username and password, was not able to
> see the animation just like that.
> 

Sorry about that. I get logged in automatically.

https://youtu.be/vTQKzpusie0


> Nonetheless, good to know I can still work with division. Will give a try.
> 
> 
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-- 

Regards
     Stephen

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