Feature Request: write additional EXR metadata

[Darby Edelen]

As someone using PTGui to stitch scene linear HDR spherical panoramas for illuminating 3D scenes it would be incredibly helpful to have information written to exported EXRs that could be used to reproduce the scene illumination precisely.

There is already standard (optional) metadata in the EXR specification that could be used. My proposal is for PTGui to write the isoSpeed, expTime, aperture data, and whiteLuminance values to exported EXRs.

Definitely open to further discussion on this topic. 

Thanks!

[PTGui Support]

Hi,

Thanks for your feedback, I've added this to the wish list.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

On 8/22/25 06:48, Darby Edelen wrote:
> As someone using PTGui to stitch scene linear HDR spherical panoramas
> for illuminating 3D scenes it would be incredibly helpful to have
> information written to exported EXRs that could be used to reproduce the
> scene illumination precisely.
>
> There is already standard (optional) metadata in the EXR specification

> <https://openexr.com/en/latest/StandardAttributes.html> that could be

> used. My proposal is for PTGui to write the isoSpeed, expTime, aperture
> data, and whiteLuminance values to exported EXRs.
>
> Definitely open to further discussion on this topic.
>
> Thanks!
>

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[Darby Edelen]

And thank you for making such wonderful software!

I've enjoyed using PTGui professionally for years but only recently had my first opportunity to take my gear on a trip and use it for myself (professional adjacent I suppose). I had a lot of fun. By the end of the trip I managed to get my setup and capture times during the day down to a fairly reasonable 10 minutes or so. I brought along a 10 stop ND filter that I would hold over the lens for an extra set of bracketed images that I could use to mask the sun disk and it worked really well!

The night time captures took a while longer, but I still enjoyed every minute. Thanks for making this possible!

[PTGui Support]

Thank you, good to hear this!

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

On 8/22/25 10:04, Darby Edelen wrote:
> And thank you for making such wonderful software!
>
> I've enjoyed using PTGui professionally for years but only recently had
> my first opportunity to take my gear on a trip and use it for myself
> (professional adjacent I suppose). I had a lot of fun. By the end of the
> trip I managed to get my setup and capture times during the day down to
> a fairly reasonable 10 minutes or so. I brought along a 10 stop ND
> filter that I would hold over the lens for an extra set of bracketed
> images that I could use to mask the sun disk and it worked really well!
>

> PTGui_xahu0R1Srh.gif
>
> The night time captures took a while longer, but I still enjoyed every
> minute. Thanks for making this possible!
>

> buck_rock_night.jpg
>
>
> On Thursday, August 21, 2025 at 10:50:52 PM UTC-7 PTGui Support wrote:
>
> Hi,
>
> Thanks for your feedback, I've added this to the wish list.
>
> Kind regards,
>
> Joost Nieuwenhuijse

> www.ptgui.com <http://www.ptgui.com>

>
> On 8/22/25 06:48, Darby Edelen wrote:
> > As someone using PTGui to stitch scene linear HDR spherical
> panoramas
> > for illuminating 3D scenes it would be incredibly helpful to have
> > information written to exported EXRs that could be used to
> reproduce the
> > scene illumination precisely.
> >
> > There is already standard (optional) metadata in the EXR
> specification

> > <https://openexr.com/en/latest/StandardAttributes.html <https://

> openexr.com/en/latest/StandardAttributes.html>> that could be
> > used. My proposal is for PTGui to write the isoSpeed, expTime,
> aperture
> > data, and whiteLuminance values to exported EXRs.
> >
> > Definitely open to further discussion on this topic.
> >
> > Thanks!
> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "PTGui Support" group.
> > To unsubscribe from this group and stop receiving emails from it,
> send
> > an email to ptgui+un...@googlegroups.com
> > <mailto:ptgui+un...@googlegroups.com>.
> > To view this discussion visit https://groups.google.com/d/msgid/

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>
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