On 14/10/2018 16:55, Alain wrote:
> Le 18-10-13 à 15:04, Stephen a écrit :
>> For testing your TV material. Create a sphere with a no image flag. 
>> This will allow the reflections of the sphere to be shown in the 
>> reflections of your TV. Convert a HDRi to a png and create a material 
>> using this and attach it to the sphere. The reflections should show up.
>> Aside, some HDR images are in a cruciform format which should be used 
>> with a box not a sphere.
>>
>> You can download some HDRIs from here:
>> https://hdrihaven.com/hdris/category/?c=all
>>
>>
> 
> There is no need to convert the HDRI to any other format as HDRI is 
> directly supported in version 3.7 and later. You can use *.HDR or *.EXR 
> files.
> 
> For a rectangular longitude-latitude image :
> sphere{0 Radius pigment{image_map{ hdr "Name.hrd" map_type 1 interpolate 
> 1} scale <-1,1,1>}finish{diffuse 0 emission 1}}
> 
> The scale is to flip the image so that it show in the correct direction 
> from the inside of the sphere.
> Some probes may be to bright or dim. Adjust emission to get correct 
> results.
> 
> 


Of course you are right. I am still, mostly, using Pov ver 3.62 SDL.
I really look forward to the news before the end of the year. :)

Apologies to David but the point still stands. Radiosity is a subject in 
itself and takes time. In my opinion.

-- 

Regards
     Stephen

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