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<div class="moz-cite-prefix">Gavin,<br>
<br>
and take a look at the Mitsuba solution for moving lights, please.<br>
<a class="moz-txt-link-freetext" href="http://www.mitsuba-renderer.org/devblog/?p=786">http://www.mitsuba-renderer.org/devblog/?p=786</a><br>
<br>
Happy Blending,<br>
Conz<br>
<br>
Am 10.06.2013 20:39, schrieb Matthew Heimlich:<br>
</div>
<blockquote
cite="mid:CAPBuH4aU7KkOz-EiFAqboYQyAtZD826Wqo2a2gZfnSkrs2FL2w@mail.gmail.com"
type="cite">
<div dir="ltr">Gavin,
<div><br>
</div>
<div style="">You may also want to poke around in the Appleseed
Render source code, as if I recall correctly they have a
pretty modern approach to deformation blur, and a very similar
architecture to Cycles as a whole.</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jun 10, 2013 at 2:33 PM, 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>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr"> Hello all,</p>
<p dir="ltr"> Brecht, thank you. I will get going on
that patch. Stuart, if you don't think that's a good idea,
let me know. Otherwise, I'll use that to focus my code
exploration.</p>
<p dir="ltr"> Nate, because of the nature of deformation
motion blur, it will include curved blur. It has to. The
reason is because most deformation is done by rotation. My
current plan is to simply add multi-step export to the
Cycles addon. (All you smart devs should yell at me if
that's a bad idea.) I am also going to browse LuxRender's
source code to see how they did it. Regardless, at the end
of this summer, not only will Cycles have deformation
motion blur, it will get multi-step export (steps will be
specified by the user) and curved motion blur by side
effect.</p>
<p dir="ltr"> God Bless,<br>
Gavin Howard</p>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_quote">On Jun 10, 2013 9:39 AM, "Nate
Wiebe" <<a moz-do-not-send="true"
href="mailto:natewiebe13@gmail.com" target="_blank">natewiebe13@gmail.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>Not entirely related, but will the scope of
this GSOC cover curved motion blur?<br>
<br>
</div>
-NateW<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jun 10, 2013 at
11:29 AM, Brecht Van Lommel <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:brechtvanlommel@pandora.be"
target="_blank">brechtvanlommel@pandora.be</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">Yes Blender supports
this, it does scene.frame_set(frame, 0.0) now,<br>
the second value is a subframe value between
0.0 and 1.0.<br>
<div>
<div><br>
On Mon, Jun 10, 2013 at 4:58 PM, Gavin
Howard <<a moz-do-not-send="true"
href="mailto:gavin.d.howard@gmail.com"
target="_blank">gavin.d.howard@gmail.com</a>>
wrote:<br>
> Hello,<br>
><br>
> Does Blender allow exporting at
arbitrary subframes? If not, that might<br>
> be a problem. If so, then Stuart has
me exploring the code, and I think that<br>
> I could write the patch while doing
so. Does that sound okay?<br>
><br>
> God Bless,<br>
> Gavin Howard<br>
><br>
> On Jun 9, 2013 6:34 AM, "Brecht Van
Lommel" <<a moz-do-not-send="true"
href="mailto:brechtvanlommel@pandora.be"
target="_blank">brechtvanlommel@pandora.be</a>><br>
> wrote:<br>
>><br>
>> We should support exporting at
the exact shutter time. At the time I<br>
>> implemented motion blur
evaluation at subframes was actually
broken<br>
>> for shape keys and physics
systems so I didn't use it, but that has<br>
>> been fixed since.<br>
>><br>
>> However, exporting motion from
the frame positions may be useful to<br>
>> keep as it may give more
predictable results in some cases. When<br>
>> you're editing animations that's
the only thing you actually see in<br>
>> animation playback, so the motion
between those frames may contain<br>
>> some unexpected things that you
don't want to render.<br>
>><br>
>> I don't know how common that is,
did not look at .blend files yet to<br>
>> see how different the results
are, if it is an issue we should<br>
>> probably have an option (off by
default) to only export motion from<br>
>> integer frame numbers and no
subframes.<br>
>><br>
>> On Sat, Jun 8, 2013 at 7:36 PM,
Gavin Howard <<a moz-do-not-send="true"
href="mailto:gavin.d.howard@gmail.com"
target="_blank">gavin.d.howard@gmail.com</a>><br>
>> wrote:<br>
>> > Hello all,<br>
>> ><br>
>> > I have a question about
implementation. I have been told by<br>
>> > Brecht that currently, the
Cycles addon exports three steps for
motion<br>
>> > blur to the renderer: one at
the previous frame, one at the current<br>
>> > frame, and one at the next
frame.<br>
>> ><br>
>> > Now, my memory may not
be serving me well here, so I may have<br>
>> > gotten the details wrong.
But if not, shouldn't the addon actually
use<br>
>> > the shutter time to
determine the first and third steps? For
example,<br>
>> > shouldn't the addon export a
step at the start of the shutter time,<br>
>> > one at the current frame,
and one at the end of the shutter time?<br>
>> > Also, I think this type of
reasoning should apply even when
multi-step<br>
>> > (more than 3) motion blur is
added. (Multi-step blur is needed for my<br>
>> > Deformation Motion Blur GSoC
project, so I will add it over the<br>
>> > summer.)<br>
>> ><br>
>> > In short, I think that
the shutter time should be the goto for<br>
>> > exporting motion blur steps.
If it is, then just ignore this. But if<br>
>> > it's not, should we change
it? Anyway, that's my two cents.<br>
>> ><br>
>> > God Bless,<br>
>> > Gavin Howard<br>
>> >
_______________________________________________<br>
>> > Bf-cycles mailing list<br>
>> > <a moz-do-not-send="true"
href="mailto:Bf-cycles@blender.org"
target="_blank">Bf-cycles@blender.org</a><br>
>> > <a moz-do-not-send="true"
href="http://lists.blender.org/mailman/listinfo/bf-cycles"
target="_blank">http://lists.blender.org/mailman/listinfo/bf-cycles</a><br>
>>
_______________________________________________<br>
>> Bf-cycles mailing list<br>
>> <a moz-do-not-send="true"
href="mailto:Bf-cycles@blender.org"
target="_blank">Bf-cycles@blender.org</a><br>
>> <a moz-do-not-send="true"
href="http://lists.blender.org/mailman/listinfo/bf-cycles"
target="_blank">http://lists.blender.org/mailman/listinfo/bf-cycles</a><br>
><br>
><br>
>
_______________________________________________<br>
> Bf-cycles mailing list<br>
> <a moz-do-not-send="true"
href="mailto:Bf-cycles@blender.org"
target="_blank">Bf-cycles@blender.org</a><br>
> <a moz-do-not-send="true"
href="http://lists.blender.org/mailman/listinfo/bf-cycles"
target="_blank">http://lists.blender.org/mailman/listinfo/bf-cycles</a><br>
><br>
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Bf-cycles mailing list<br>
<a moz-do-not-send="true"
href="mailto:Bf-cycles@blender.org"
target="_blank">Bf-cycles@blender.org</a><br>
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href="http://lists.blender.org/mailman/listinfo/bf-cycles"
target="_blank">http://lists.blender.org/mailman/listinfo/bf-cycles</a><br>
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<br>
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Bf-cycles mailing list<br>
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href="mailto:Bf-cycles@blender.org"
target="_blank">Bf-cycles@blender.org</a><br>
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href="http://lists.blender.org/mailman/listinfo/bf-cycles"
target="_blank">http://lists.blender.org/mailman/listinfo/bf-cycles</a><br>
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<br>
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<pre wrap="">_______________________________________________
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