Alain nous apporta ses lumieres en ce 2007/06/26 20:33:
> clarkking nous apporta ses lumieres en ce 2007/06/26 15:32:
>> "Grassblade" <nomail@nomail> wrote:
>>> "clarkking" <cla### [at] sbcglobalnet> wrote:
>>>> I have been using Pov Ray now for a few weeks concentrating on learning
>>>> syntax.  I have seen its results and capabilities before however 
>>>> since i
>>>> have played about with 3d art for several years now.  I am simply 
>>>> amazed at
>>>> some of the photorealistic results using hdri and radiosity can offer.
>>>>
>>>> At current however i am trying to render a scene with a transparent
>>>> background.  I am using the +UA command line switch and "no_image" for
>>>> anything like a plane or background.  Now my render in Pov is an 
>>>> image say
>>>> with my oject perfectly rendered with a trans. bg.  However when i 
>>>> go to
>>>> open the image file in say Adobe elements (editor) the image has a 
>>>> black
>>>> bg, and I cant seem to separate it.  Thats rendering to bmp format.  
>>>> I have
>>>> also tried outputing as Targa format but same thing happens.  What am i
>>>> doing wrong.
>>> 'twould seem you haven't played enough with *2d* art. ;-) To save
>>> transparency you need an alpha channel, it is present in PNGs and some
>>> Targas, AFAIK. BMP doesn't have it, so your image editor will read the
>>> pigment and output black or white depending if it reads 0,0,0 as 
>>> black or
>>> white.
>>>>  My goal here is to take that object and layer it onto a bg
>>>> image in the iamge editor.  Also could i just use the image as my
>>>> background in Pov?  How would I do that though, as an image map?  I 
>>>> have
>>>> tried that i think but how do i tell Pov Ray where to look for the 
>>>> image?
>>> Respectively yes, yes and Library_Path (or +L, see
>>> http://www.povray.org/documentation/view/3.6.1/220/).
>>>> Well thats enough for now...thanks alot.
>>>>
>>>>
>>>> <C>
>>
>> Thank you both it works of course.
>>
>> I would really like to learn more about using HDRI light maps to light my
>> scenes and objects.  Can i do that with the current version of POV?  I 
>> have
>> seen online Mega POV and i have downloaded it.  but does it just run 
>> in the
>> background to the main POV 3.6 windows console?  I am a beginner with 
>> hdri
>> for sure so some comprehensive tutoials would be wonderful.
>>
>>
>> Thanks again!
>>
>>
> Normal POV-Ray don't support HDR. BUT, megapov does, as does the current 
> 1.7BETA version.
> 
> Please remember that the v1.7x are beta, development versions that have 
> an expiry date. The expiry date is there to prevent bug repost about 
> versions that are to old and whose bugs may be solved in more recent 
> versions.
> 
Excuse me, I meant v3.7 beta, not 1.x :-(

-- 
Alain
-------------------------------------------------
Politicians are like diapers, they should be changed often and for the same reason.
	Bob Monkhouse

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