On 19/12/2017 21:38, Alain wrote:
> Le 17-12-18 à 22:12, Masaki  a écrit :
>> Thanks for the reply.
>> I have some new questions.
>>
>>> There are a couple of things wrong with your scene. First, your lights
>>> and objects are inside the Prism. So you will not see anything.
>> (1) Does it mean that I can not see the light from the outside of the 
>> prism when
>> there is a light source in the prism which is transparent object?
> 
> I think that he miss the transparency.

I did.


> As your prism is transparent, light will shine through.
> 
>>
>>
>> (2) In pov-ray, is it possible for the camera to visualize the direct 
>> light from
>> the source?
> 
> Never ever.
> The light_source is an abstraction that have no tangible existence. It 
> just illuminate things. For a light_source to be visible, you need to 
> associate it with some object, usually by the use of looks_like{...}
> It can also be achieved using an union that include the light.

There is always the "Looks_like" in the camera statement.



-- 

Regards
     Stephen

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