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I just found something rather odd... If I render an image using +UA, the
transparent parts come out transparent, and the image otherwise looks
the same. Except... when the mosaic preview finishes and the final pass
renders, all the specular highlights vanish! WTH?
Have I discovered a bug, or am I doing something wrong?
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Orchid XP v3 wrote:
> I just found something rather odd... If I render an image using +UA, the
> transparent parts come out transparent, and the image otherwise looks
> the same. Except... when the mosaic preview finishes and the final pass
> renders, all the specular highlights vanish! WTH?
>
> Have I discovered a bug, or am I doing something wrong?
Please post a scene. My specular highlights have always shown up when
using +UA.
...Chambers
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> Please post a scene. My specular highlights have always shown up when
> using +UA.
Minimal:
camera
{
location <0, 0, -3>
}
light_source {<-3, +2, -5>, colour rgb 0.8}
light_source {<+3, -2, -5>, colour rgb 0.5}
// Background
object
{
sphere {0, 1}
scale <1.5, 1.5, 0.1>
translate +0.2*z
texture
{
pigment {colour rgb <1.0, 0.8, 0.5>}
finish
{
ambient 0
specular 0.8
metallic 1
reflection {0, 1 fresnel}
}
}
interior {ior 1.5}
}
If I render this without +UA, specular hilights show up. If I add +UA,
the highlights show up on all of the mosaic preview passes, then
suddenly vanish on the final pass. (Hilights also don't show up in the
produced PNG file.)
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Orchid XP v3 nous apporta ses lumieres en ce 04-03-2007 06:42:
>> Please post a scene. My specular highlights have always shown up when
>> using +UA.
> Minimal:
> camera
> {
> location <0, 0, -3>
> }
> light_source {<-3, +2, -5>, colour rgb 0.8}
> light_source {<+3, -2, -5>, colour rgb 0.5}
> // Background
> object
> {
> sphere {0, 1}
> scale <1.5, 1.5, 0.1>
> translate +0.2*z
> texture
> {
> pigment {colour rgb <1.0, 0.8, 0.5>}
> finish
> {
> ambient 0
> specular 0.8
> metallic 1
> reflection {0, 1 fresnel}
> }
> }
> interior {ior 1.5}
> }
> If I render this without +UA, specular hilights show up. If I add +UA,
> the highlights show up on all of the mosaic preview passes, then
> suddenly vanish on the final pass. (Hilights also don't show up in the
> produced PNG file.)
Just tested your scene. The highlights do appears hith and without +ua. The
difference, is that I don't use mosaic preview. Try turning that OFF, anyway,
it's not realy usefull and increase the rendering time. I only get the mosaic
when doing radiosity during the pretrace steps.
--
Alain
-------------------------------------------------
If you're ever about to be mugged by a couple of clowns, don't hesitate - go for
the juggler.
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I can confirm that, in 3.6.1, using alpha output (+ua) disables the
highlights. When using a Mosaic Preview, the highlights do show up in
the preview passes, but not in the final pass.
The current 3.7 beta does not exhibit this bug.
...Chambers
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Alain <ele### [at] netscape net> wrote:
> Try turning that OFF, anyway,
> it's not realy usefull and increase the rendering time.
That's not the point. Besides, mosaic preview *is* useful for exactly
what the name implies: For a quick *preview*. (Naturally it's useless
for a final render.)
--
- Warp
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> I can confirm that, in 3.6.1, using alpha output (+ua) disables the
> highlights. When using a Mosaic Preview, the highlights do show up in
> the preview passes, but not in the final pass.
POV-Ray 3.6.1a.icl8.win32.
With or without Mosaic Preview, the final render & generated PNG file
lack specular hilights. The preview passes do show hilight.
> The current 3.7 beta does not exhibit this bug.
I haven't tried that...
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Saw the same bug with your sample with
+ua in 3.6.1.3
Seems to be fixed in 3.7 beta
Also noticed that using +sp32 or greater
resulted in lines of white dots near the bottom
of the image with beta 3.7.19a
(some of the dots only show in the render
image window, but don't make it to the image
file, others make it to the file, so it's not just
the render image window)
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