Hi,A big thank you in advance.

I have a very large scene, consisting of polygons and 40 million sphere.
I'm trying to only calculate the radiosity on the surface of the polygons. Can I
tell POV-Ray 3.7 to not calculate radiosity for sphere objects.
I've tried importance 0.0001 and radiosity  off. But nothing seems to work.

Cheers

FElix

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Am 21.06.2012 04:21, schrieb felipk101:
> Hi,A big thank you in advance.
>
> I have a very large scene, consisting of polygons and 40 million sphere.
> I'm trying to only calculate the radiosity on the surface of the polygons. Can I
> tell POV-Ray 3.7 to not calculate radiosity for sphere objects.

If I understand you correctly, then you want the polygons to be rendered 
with radiosity illumination (honoring the effects of the spheres on 
this), but the spheres to be rendered with classic illumination (i.e. 
just the constant "ambient" term).

This is currently not possible. (However, if you're only interested in 
the spheres' radiosity effects on the polygons, and don't actually need 
the spheres in the image otherwise, then you can specify "no_image" on 
the spheres to not waste computation time on them.)

If, on the other hand, I'm misunderstanding you, and what you really 
want is everything to be rendered with radiosity illumination, but not 
honoring the effects of the spheres on this, then you can achieve this 
by specifying "no_radiosity" for the spheres; this makes them 
"invisible" to radiosity computations on other objects.

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clipka <ano### [at] anonymousorg> wrote:
> Am 21.06.2012 04:21, schrieb felipk101:
> > Hi,A big thank you in advance.
> >
> > I have a very large scene, consisting of polygons and 40 million sphere.
> > I'm trying to only calculate the radiosity on the surface of the polygons. Can I
> > tell POV-Ray 3.7 to not calculate radiosity for sphere objects.
>
> If I understand you correctly, then you want the polygons to be rendered
> with radiosity illumination (honoring the effects of the spheres on
> this), but the spheres to be rendered with classic illumination (i.e.
> just the constant "ambient" term).
>
> This is currently not possible. (However, if you're only interested in
> the spheres' radiosity effects on the polygons, and don't actually need
> the spheres in the image otherwise, then you can specify "no_image" on
> the spheres to not waste computation time on them.)
>
> If, on the other hand, I'm misunderstanding you, and what you really
> want is everything to be rendered with radiosity illumination, but not
> honoring the effects of the spheres on this, then you can achieve this
> by specifying "no_radiosity" for the spheres; this makes them
> "invisible" to radiosity computations on other objects.


Hi Clipka,

Thanks for your advice, I'm actually not even concerned with rendering the scene
rather only working with POVRays radiosity algorithm. So I save the radiosity
values to file and than run statistics from anther software.

So I would like to see the effect that the spheres have on the polygon surfaces
only. I've now tried a number of things, and the one that seems to be doing the
trick is setting diffuse to 0. So now I believe they are just blocking radiosity
rays!! So your first paragraph but minus even rendering the spheres.

Cheers

Felix

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