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.

-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you hope that you can render your 
ideas on your PC before you die.
Sven Rudolph (Germany)

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