[Sidefx-houdini-list] Sidefx-houdini-list Digest, Vol 235, Issue 4

Brian Burke bburke at methodstudios.com
Thu Mar 4 13:05:16 EST 2010


In regards to the Nuke method of working with the vectors from a Mantra 
render, the standard issue Nuke Vector Blur does a good job.

-b


On 03/04/2010 09:00 AM, sidefx-houdini-list-request at sidefx.com wrote:
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> Today's Topics:
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>     1. Re: Vector motion blur render pass query (Phil Spicer)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 4 Mar 2010 14:04:28 +0000
> From: Phil Spicer<PSpicer at bournemouth.ac.uk>
> Subject: Re: [Sidefx-houdini-list] Vector motion blur render pass
> 	query
> To: "sidefx-houdini-list at sidefx.com"<sidefx-houdini-list at sidefx.com>
> Message-ID:
> 	<9A0DE740AAB04B4DB1DAFFE3179A78600159CA4A587D at TAS.bournemouth.ac.uk>
> Content-Type: text/plain; charset="Windows-1252"
>
> Hi,
>
> Here is the link for the free Shake plugin:
>
> Shake macro (ndo_IDirBlur)  http://www.creativecrash.com/shake/downloads/macros/c/ndo_idirblur--2
>
>
> Kind regards,
>
> Phil.
>
>
>
>
> -----Original Message-----
> From: sidefx-houdini-list-bounces at sidefx.com [mailto:sidefx-houdini-list-bounces at sidefx.com] On Behalf Of Pablo Gim?nez
> Sent: 04 March 2010 12:58
> To: sidefx-houdini-list at sidefx.com
> Subject: Re: [Sidefx-houdini-list] Vector motion blur render pass query
>
> I believe there is a Motion Blur operator in Nuke, but I haven't use any motion vectors from Houdini with it.
> But I think it should be something is a very common task I think.
>
> 2010/3/3 Phil Spicer<PSpicer at bournemouth.ac.uk>
>
>    
>> Hi,
>>
>> Thank you so much for all your postings about this. My understanding
>> of all things rsmb has increased a great deal over the past day or so.
>> This last posting is especially welcome...
>>
>> We have found a free plugin for Shake that will accept this Render
>> Pass. I will find out the link for it and post it to you. I am trying
>> to identify a similar operator for Nuke if anyone has come across one.
>>
>> Kind regards,
>>
>> Phil.
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: sidefx-houdini-list-bounces at sidefx.com [mailto:
>> sidefx-houdini-list-bounces at sidefx.com] On Behalf Of steven ong
>> Sent: 03 March 2010 19:17
>> To: sidefx-houdini-list at sidefx.com
>> Subject: Re: [Sidefx-houdini-list] Vector motion blur render pass
>> query
>>
>> There's a forum thread on this and xtimmyx posted something to the
>> Exchange too.
>>
>>
>> http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewt
>> opic&t=15521
>>
>> Cheers!
>> steven
>>
>>
>>      
>>> As Sebastian told you can get the velocity vectors and transform
>>> them to Camera space using a space transform sop.
>>> This works fine.
>>> Also, more easy, you can setup a secondary pass and export the
>>> velocity vectors from your surface shader.
>>>
>>> 2010/3/2 Sebastian H. Schmidt<sebastian.h.schmidt at googlemail.com>
>>>
>>>        
>>>> the vop node getBlurP (vex function getblurP) is your friend ;)
>>>> take the position at the beginning and end of a frame and calculate
>>>> the velocity, to transfer something into camera space use the
>>>> toNDC, or the transform VOP
>>>>
>>>>
>>>> Seb
>>>>
>>>> On Tue, Mar 2, 2010 at 9:23 AM, Phil Spicer
>>>> <PSpicer at bournemouth.ac.uk
>>>>          
>>>>> wrote:
>>>>>            
>>>>          
>>>>> Hi,
>>>>>
>>>>> Is there any way output a motion velocity vector render pass for
>>>>>            
>>>> creating
>>>>          
>>>>> motion blur in the composite? I have tried generating one using
>>>>>            
>>>> the Trail
>>>>          
>>>>> SOP and re-ranging the velocity data to output as colour using
>>>>> the
>>>>>            
>>>> Point
>>>>          
>>>>> SOP, and this works; however everything is in World Space rather
>>>>>            
>>>> than
>>>>          
>>>>> relative to Camera Space. I am playing with VOPs as we speak...
>>>>>
>>>>> Any thoughts welcome...
>>>>>
>>>>> Kind regards,
>>>>>
>>>>> Phil.
>>>>>
>>>>> BU - the UK's Number One New University The Guardian University
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>>> --
>>> Un saludo
>>> Best Regards
>>> Pablo Gim?nez
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>
>
> --
> Un saludo
> Best Regards
> Pablo Gim?nez
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