Re: compositing with EXR

On 10/27/05, Deke Kincaid <[email protected]> wrote:
>
> On 10/27/05, ant l <[email protected]> wrote:
> > Hello,
> >
> > how do people generally work with EXR images in composting? More
> > specifically, I'd like to comp CG elements rendered as .exr over a
> cineon
> > plate.
> >
> > thanks,
> > ant
>
> Change your cineon to linear colorspace and then comp them together in
> a compositor. EXR is just an image format. It's not magical or
> anything. Maybe you could be more elaborate about what you don't
> understand about exr?
>
> --
> Deke Kincaid
> Momentum Lab
> The Post Group
> 310-883-4313



Thanks for the reply..I'll try to explain better.
I understand that exr is just another file format and that it can be treated
as such. However what seems unclear to me is how this is used in a
production pipeline.
Typically, cineon are converted to linear format and stored in 16bit images.
OpenEXR images are read as 32bit floats (by Shake at least) and are quite
slow to work with. Is this a price that
we have to pay? I tried to convert them to 16bit (to match the cineon plate)
however, they get clipped to 1 which makes it a useless operation.

I guess my question is if people generally use them as 32bit floats or
convert them to something smaller? And if so, how?

thanks!

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