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<div class="moz-cite-prefix">Hi,<br>
I have to say I like the idea.<br>
<br>
Spectral rendering can give more accurate results and if (that
would be a condition imho) the feature can be added to Cycles in a
nice way, as a UI option, all fine.<br>
It should be optional, so people who do not need it, don't suffer
from longer render times. <br>
<br>
Best regards,<br>
Thomas<br>
<br>
Am 10.04.2013 03:36, schrieb Agustin Benavidez:<br>
</div>
<blockquote
cite="mid:CADibYMFr_cYppGjAG9bSg-SGMkKEoJrX3augF5HWTig7gqRRkg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>Hi, my humble opinion is that this idea somehow doesn't fit
into the Cycles philosophy and focus which is be the best
balance between speed and realism/accuracy and animation
oriented, We already got great render engines capable of that
integrated in blender like Luxrender, spending a Summer Of
Code slot to re-do what others complementary OOS projects do
best is not worth.</div>
<div><br>
</div>
<div>Here is what you can already do with a relative simple node
setup:</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="http://www.youtube.com/watch?v=jMsW5gPqS6c">http://www.youtube.com/watch?v=jMsW5gPqS6c</a></div>
<div>
<a moz-do-not-send="true"
href="http://www.blendswap.com/blends/view/39307">http://www.blendswap.com/blends/view/39307</a></div>
<div><br>
</div>
<div>I understand dispersion is not only about little rainbows,
but I agree with Dalai, and don't see this improving Cycles
general usage. </div>
<div>Anyway We need to be open and will be nice to see some
examples of the quality boost that this could bring :)</div>
<div>Best regards.</div>
<div style="">Agus</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">
2013/4/9 Gavin Howard <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:gavin.d.howard@gmail.com" target="_blank">gavin.d.howard@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
David,<br>
Cycles has a subsurface scatter node in the development
builds,<br>
correct? If that's the case, I will see if I can render some
scenes in<br>
Cycles and LuxRender to show the difference. It's not going
to be the<br>
best, but it should show something.<br>
Gavin H.<br>
<div class="HOEnZb">
<div class="h5"><br>
On Tue, Apr 9, 2013 at 5:20 PM, David <<a
moz-do-not-send="true" href="mailto:erwin94@gmx.net">erwin94@gmx.net</a>>
wrote:<br>
> On Apr 10, 2013, at 12:55 AM, Brecht Van Lommel
wrote:<br>
>> On Wed, Apr 10, 2013 at 12:08 AM, David <<a
moz-do-not-send="true" href="mailto:erwin94@gmx.net">erwin94@gmx.net</a>>
wrote:<br>
>>> this is by far the best visual explanation
of what separates spectral<br>
>>> rendering from normal RGB rendering that I
have seen:<br>
>>><br>
>>> <a moz-do-not-send="true"
href="http://www.luxrender.net/wiki/LuxRender_Textures_Spectrum#Gaussian_spectrum"
target="_blank">http://www.luxrender.net/wiki/LuxRender_Textures_Spectrum#Gaussian_spectrum</a><br>
>>><br>
>>> All lamps in this image would be the same
RGB color, and produce the<br>
>>> same result with non-spectral rendering.<br>
>><br>
>> I don't think that's true? The exact result
depends on the wavelength<br>
>> to RGB conversion function, but a wider
gaussian distribution across<br>
>> the wavelength should give different RGB values
than a narrow one? As<br>
>> the distribution gets wider there will a more
even distribution across<br>
>> the RGB channels.<br>
>><br>
>> It wouldn't be as accurate but the lights would
still render different I think?<br>
>><br>
>> Brecht.<br>
><br>
> Ah, you're right, and it is even sort of explained
in the text I linked to, so I<br>
> feel especially dumb. ;) The width of the
distribution corresponds roughly to<br>
> saturation, it's basically just HSV.<br>
> So, the only effect that I can think of that is
really not approximated by RGB<br>
> rendering is dispersion? I would love to see an
image where the light spectrum<br>
> makes a noticeable difference, that isn't of a
prism or a diamond...<br>
><br>
> till then, David.<br>
><br>
> _______________________________________________<br>
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<br>
<pre class="moz-signature" cols="72">--
Thomas Dinges
Blender Developer, Artist and Musician
<a class="moz-txt-link-abbreviated" href="http://www.dingto.org">www.dingto.org</a></pre>
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