[Sidefx-houdini-list] [HOM] Subframe evaluation of PythonSOPs

Andrew D Lyons tstexture at gmail.com
Sat Feb 2 13:22:04 EST 2008

Thanks for publishing the results of all this research Andras. This
doesn't sound like ideal behavior, and hopefully it gets some


On 02/02/2008, Andras Ikladi <andras.ikladi at gmail.com> wrote:
> Hi list,
> I bumped into an interesting problem with my third python SOP:
> Basically I generate point positions for each integer frame, and from this,
> I (for now) linearly blend subframe data, which is fine.
> When I eyeball my result in the viewport for non-integer frames, it all
> looks just fine.
> Now, let's try motionblur as that's always the killer of this kind of
> things, directly rendering the SOP: nothing.
> However, if I archive the geometry output of my SOP at $F and $F+shutter,
> and render that
> (either as a DRA or simply with a fileSOP with no time*SOPs attached), I get
> the proper blur.
> I tried this with all the three shutter evaluation modes, and (obviously
> after changing the archives) it all worked.
> What am I missing? Or is this a limitation of PythonSOPs/Soho? A possible
> bug?
> Thanks,
> Andras
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Andrew D Lyons | Digital Artist | http://www.tstex.com

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