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- From: "Bo Huang" <
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- To: <
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- Subject: [Manta] RE: Re: manta flexibility
- Date: Wed, 17 Mar 2010 13:46:06 -0400
Hi there
Simple if placed in comparison to bidirectional, MLT, and etc. techniques.
The path tracing code itself is actually intricately complex, architectured
with multi-threading and ray packet coherency in mind right from the start.
For example, to keep the same material nearby, and squeeze out killed rays in
a packet, the renderer constantly sorts a RaypacketData's numerous color,
texture, scratch pad, and etc. members arrays. Since this is a lot of work, I
assume the resultant sorted packet coherency is a large gain over unsorted
and thus having to deal with many many more branching and for loops.
Though I had to modify a lot, the frame work in place is quite respectable. I
don't know if you can find this to be standard from other open source path
tracers, at least the simple ones I looked at.
Thanks
Bo
-----Original Message-----
From: Thiago Ize
[mailto:
Sent: Wed 3/17/2010 1:15 PM
To:
Subject: [Manta] Re: manta flexibility
Off the top of my head, Manta has a simple (brute force) path tracer, it
can do soft shadows (outside of the path tracer as well), and also
ambient occlusion. And of course if it doesn't have something you can
add it. I am not aware of Manta currently having bidirectional path
tracing, metropolis light transport, photon mapping, or any of the other
fancy GI stuff.
Thiago
David E DeMarle wrote:
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Howdy all,
>
>
I am trying to write an article for the KW Source
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<http://www.kitware.com/products/thesource.html> about Ollie's
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vtkManta work.
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I want to make the point that Manta is flexible so that I can make a
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compelling case for future work about doing more than rendering of
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meshes with it, and to support a claim that it can be made to render
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very realistically.
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I know Manta can do lots of primitive types, can do volume rendering,
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isosurface rendering, and so forth.
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I would appreciate some clarification on to what extent it can do high
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quality rendering (Galileo?/Precomputed Global Illumination?,Soft
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Shadows?) and rendering of general implicit functions (mandelbub
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challenge) directly.
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thanks,
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David E DeMarle
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Kitware, Inc.
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R&D Engineer
>
28 Corporate Drive
>
Clifton Park, NY 12065-8662
>
Phone: 518-371-3971 x109
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