[Sidefx-houdini-list] Camera model

Jordi Bares jordibares at gmail.com
Fri Nov 30 17:44:22 EST 2012


I think I understood that, anyway, a lens shader is something that brings a some benefits and is something i would love to see in Houdini. 

:-)

Jb



Sent from my iPhone

On 30 Nov 2012, at 21:01, John Coldrick <john.coldrick at gmail.com> wrote:

> Just jumping in here - I think Colin's point is that you usually can't
> track distorted plates.  Nothing saying you can't, ever, but that's the
> first step assuming you're working with full filmback plates - undistort
> the plate before tracking.  Additionally, pipeline aside, just the notion
> of burning a distortion into a render seems like a bad idea to me in
> general.  There's no way to perfectly 'undo' distortion if it's burned into
> the lens.  Anyway, 2c, etc.
> 
> Hey Colin!
> 
> Cheers,
> 
> J.C.
> 
> 
> On Fri, Nov 30, 2012 at 3:02 PM, Jordi Bares <jordibares at gmail.com> wrote:
> 
>> 
>>> Depending on the footage tracking anything that has some sort of
>> perceptual distortion has always led to tracking issues somewhere in a
>> sequence - but to each their own.
>>> 
>>> Cheers
>> 
>> You would track the undistorted plates but render distorted.
>> 
>> Jb
>> 
>>> On 2012-11-30, at 3:26 AM, Jordi Bares <jordibares at gmail.com> wrote:
>>> 
>>>> You may very well undistort plates yet render distorted, then compbon
>> the original distorted footage to minimise transformations in the CG and
>> the footage.
>>>> 
>>>> Certainly simplifies the workflow by minimising dependencies.
>>>> 
>>>> There are creative reasons too like rendering spherical panoramas for
>> rides or immersive experiences and also for projection mapping for shows.
>>>> 
>>>> Hope it helps
>>>> Jb
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