On 08/08/2018 22:02, Mike Horvath wrote:
> On 8/8/2018 1:05 PM, Stephen wrote:
>> On 08/08/2018 15:08, Mike Horvath wrote:
>>> Okay, I uploaded my scene to here:
>>>
>>>
http://lib.povray.org/searchcollection/index2.php?objectName=Ringworld&version=2.0&contributorTag=SharkD

>>>
>>>
>>> I also attached my latest render to this post. The shadow squares' 
>>> widths now match what was apparently stated in the books. The 
>>> shadowed regions on the ring look much better now.
>>>
>>> However, I had to double the height of the shadow squares in order to 
>>> block out the sun. See the parameter `RWorld_Shadow_Square_Width`. 
>>> I'm not sure why this was necessary, as the original height was equal 
>>> to the sun's diameter, and should have fully blocked its light.
>>>
>>
>> Do the two area_light vectors <Axis_1> and <Axis_2> extend beyond the 
>> star's volume?
>>
> 
> 1. the axis lengths are equal to the sun's diameter
> 2. the area light is circular and oriented
> 3. the sun's diameter should be equal to the shadow squares' height 
> according to Niven's website

Just a check list.
I just noticed that the data I was looking at was from the game. Oops.


> 4. an array of point lights in the shape of a sphere does not suffer 
> from the issues I'm experiencing
> 

How do you do that without them clustering at the poles?


> 
>>> Oh well.
>>>
>>>
>>
>> I like the image especially the shadows cast by the shadow squares in 
>> the solar wind. :)
>>
> 
> Thanks!
> 
> 
>> Unfortunately I don't have CIE.inc or lightsys.inc installed. :(
>>
>>
> 
> I use them in nearly everything. Not sure why. Probably just habit.
> 
> 
Probably a good habit to have.



-- 

Regards
     Stephen

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