PT Gui Defaults to Camera Data Rather than my Lightened Exposures pre Stitching
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Hugh Brown
Jul 11, 2026, 4:22:19 AM (3 days ago) Jul 11
to PTGui Support
I have been lightening my exposures in Photoshop ACR (Adobe Camera Raw) prior to stitching.
But when I pull them into PT Gui afind that the exposure has darkened considerably from the files ingested.
I have unchecked the box for Perform Automatic Exposure and Colour Adjustment in the Project Settings.
Any thoughts as to solution?
PTGui Support
Jul 11, 2026, 4:27:50 AM (3 days ago) Jul 11
to pt...@googlegroups.com
Hi Hugh,
Are you loading the raw files in PTGui? Or are you converting them to
TIFF in ACR and load the TIFFs in PTGui?
If it's the former (loading the RAWs): this is the expected behavior.
ACR doesn't actually modify the raw files when you adjust the exposure.
It just changes some metadata. This metadata is specific to the
algorithms in ACR, so PTGui cannot read it.
You can tell PTGui to boost the exposure using the Post Processing tab
in the Panorama Editor window.
Kind regards,
Joost Nieuwenhuijse
www.ptgui.com
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Are you loading the raw files in PTGui? Or are you converting them to
TIFF in ACR and load the TIFFs in PTGui?
If it's the former (loading the RAWs): this is the expected behavior.
ACR doesn't actually modify the raw files when you adjust the exposure.
It just changes some metadata. This metadata is specific to the
algorithms in ACR, so PTGui cannot read it.
You can tell PTGui to boost the exposure using the Post Processing tab
in the Panorama Editor window.
Kind regards,
Joost Nieuwenhuijse
www.ptgui.com
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Hugh Brown
Jul 11, 2026, 4:31:38 AM (3 days ago) Jul 11
to pt...@googlegroups.com
Hey Mate.
Loading stacked TIFFs into PTG with vignetting and green colour noise corrections only in ACR beforehand.
But even when I do the exposure adjustments to the stacked files they are not carrying across into PTG.
But definitely want the changes made pre PTG to carry through.
Loading stacked TIFFs into PTG with vignetting and green colour noise corrections only in ACR beforehand.
But even when I do the exposure adjustments to the stacked files they are not carrying across into PTG.
But definitely want the changes made pre PTG to carry through.
Cheers. Hugh.
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PTGui Support
Jul 11, 2026, 4:44:17 AM (3 days ago) Jul 11
to pt...@googlegroups.com
You might have images with different exposures mixed into the same
project. If Exposure Compensation is enabled, PTGui will brighten the
darkest exposure and darken the brightest exposures to get them on the
same exposure level. This might be what you are seeing.
Try disabling Exposure Compensation in the Blending tab in the Panorama
Editor.
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project. If Exposure Compensation is enabled, PTGui will brighten the
darkest exposure and darken the brightest exposures to get them on the
same exposure level. This might be what you are seeing.
Try disabling Exposure Compensation in the Blending tab in the Panorama
Editor.
On 7/11/26 10:31, Hugh Brown wrote:
> Hey Mate.
>
> Loading stacked TIFFs into PTG with vignetting and green colour noise
> corrections only in ACR beforehand.
>
> But even when I do the exposure adjustments to the stacked files they
> are not carrying across into PTG.
>
> But definitely want the changes made pre PTG to carry through.
>
> Cheers. Hugh.
>
> On Sat, Jul 11, 2026 at 4:27 PM 'PTGui Support' via PTGui Support
> <pt...@googlegroups.com <mailto:pt...@googlegroups.com>> wrote:
>
> Hi Hugh,
>
> Are you loading the raw files in PTGui? Or are you converting them to
> TIFF in ACR and load the TIFFs in PTGui?
>
> If it's the former (loading the RAWs): this is the expected behavior.
> ACR doesn't actually modify the raw files when you adjust the exposure.
> It just changes some metadata. This metadata is specific to the
> algorithms in ACR, so PTGui cannot read it.
>
> You can tell PTGui to boost the exposure using the Post Processing tab
> in the Panorama Editor window.
>
> Kind regards,
>
> Joost Nieuwenhuijse
> www.ptgui.com <http://www.ptgui.com>
> Hey Mate.
>
> Loading stacked TIFFs into PTG with vignetting and green colour noise
> corrections only in ACR beforehand.
>
> But even when I do the exposure adjustments to the stacked files they
> are not carrying across into PTG.
>
> But definitely want the changes made pre PTG to carry through.
>
> Cheers. Hugh.
>
> On Sat, Jul 11, 2026 at 4:27 PM 'PTGui Support' via PTGui Support
> <pt...@googlegroups.com <mailto:pt...@googlegroups.com>> wrote:
>
> Hi Hugh,
>
> Are you loading the raw files in PTGui? Or are you converting them to
> TIFF in ACR and load the TIFFs in PTGui?
>
> If it's the former (loading the RAWs): this is the expected behavior.
> ACR doesn't actually modify the raw files when you adjust the exposure.
> It just changes some metadata. This metadata is specific to the
> algorithms in ACR, so PTGui cannot read it.
>
> You can tell PTGui to boost the exposure using the Post Processing tab
> in the Panorama Editor window.
>
> Kind regards,
>
> Joost Nieuwenhuijse
>
> On 7/11/26 01:25, Hugh Brown wrote:
> > I have been lightening my exposures in Photoshop ACR (Adobe
> Camera Raw)
> > prior to stitching.
> >
> > But when I pull them into PT Gui afind that the exposure has
> darkened
> > considerably from the files ingested.
> >
> > I have unchecked the box for Perform Automatic Exposure and Colour
> > Adjustment in the Project Settings.
> >
> > Any thoughts as to solution?
> >
> >
> > --
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> send
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> <mailto:ptgui%2Bunsu...@googlegroups.com>
> On 7/11/26 01:25, Hugh Brown wrote:
> > I have been lightening my exposures in Photoshop ACR (Adobe
> Camera Raw)
> > prior to stitching.
> >
> > But when I pull them into PT Gui afind that the exposure has
> darkened
> > considerably from the files ingested.
> >
> > I have unchecked the box for Perform Automatic Exposure and Colour
> > Adjustment in the Project Settings.
> >
> > Any thoughts as to solution?
> >
> >
> > --
> > 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
> <mailto:ptgui%2Bunsu...@googlegroups.com>>.
> > To view this discussion visit https://groups.google.com/d/msgid/
> <https://groups.google.com/d/msgid/>
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> > utm_medium=email&utm_source=footer>.
>
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Hugh Brown
Jul 11, 2026, 7:15:51 AM (3 days ago) Jul 11
to pt...@googlegroups.com
All exact same exposures mate. Exposure compensation already unchecked in blending. 13 seconds every single one of the 100 or so images.
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PTGui Support
Jul 11, 2026, 7:50:58 AM (3 days ago) Jul 11
to pt...@googlegroups.com
So if you load a single one of your TIFF files in PTGui, it is showing
darker than when you load the same image in another application?
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darker than when you load the same image in another application?
On 7/11/26 13:15, Hugh Brown wrote:
> All exact same exposures mate. Exposure compensation already unchecked
> in blending. 13 seconds every single one of the 100 or so images.
>
> On Sat, 11 Jul 2026 at 16:44, 'PTGui Support' via PTGui Support
> <pt...@googlegroups.com <mailto:pt...@googlegroups.com>> wrote:
>
> You might have images with different exposures mixed into the same
> project. If Exposure Compensation is enabled, PTGui will brighten the
> darkest exposure and darken the brightest exposures to get them on the
> same exposure level. This might be what you are seeing.
>
> Try disabling Exposure Compensation in the Blending tab in the Panorama
> Editor.
>
> Kind regards,
>
> Joost Nieuwenhuijse
> www.ptgui.com <http://www.ptgui.com>
> All exact same exposures mate. Exposure compensation already unchecked
> in blending. 13 seconds every single one of the 100 or so images.
>
> On Sat, 11 Jul 2026 at 16:44, 'PTGui Support' via PTGui Support
> <pt...@googlegroups.com <mailto:pt...@googlegroups.com>> wrote:
>
> You might have images with different exposures mixed into the same
> project. If Exposure Compensation is enabled, PTGui will brighten the
> darkest exposure and darken the brightest exposures to get them on the
> same exposure level. This might be what you are seeing.
>
> Try disabling Exposure Compensation in the Blending tab in the Panorama
> Editor.
>
> Kind regards,
>
> Joost Nieuwenhuijse
>
> On 7/11/26 10:31, Hugh Brown wrote:
> > Hey Mate.
> >
> > Loading stacked TIFFs into PTG with vignetting and green colour
> noise
> > corrections only in ACR beforehand.
> >
> > But even when I do the exposure adjustments to the stacked files
> they
> > are not carrying across into PTG.
> >
> > But definitely want the changes made pre PTG to carry through.
> >
> > Cheers. Hugh.
> >
> > On Sat, Jul 11, 2026 at 4:27 PM 'PTGui Support' via PTGui Support
> > <pt...@googlegroups.com <mailto:pt...@googlegroups.com>
> On 7/11/26 10:31, Hugh Brown wrote:
> > Hey Mate.
> >
> > Loading stacked TIFFs into PTG with vignetting and green colour
> noise
> > corrections only in ACR beforehand.
> >
> > But even when I do the exposure adjustments to the stacked files
> they
> > are not carrying across into PTG.
> >
> > But definitely want the changes made pre PTG to carry through.
> >
> > Cheers. Hugh.
> >
> > On Sat, Jul 11, 2026 at 4:27 PM 'PTGui Support' via PTGui Support
> > <pt...@googlegroups.com <mailto:pt...@googlegroups.com>
> <mailto:pt...@googlegroups.com <mailto:pt...@googlegroups.com>>> wrote:
> >
> > Hi Hugh,
> >
> > Are you loading the raw files in PTGui? Or are you converting
> them to
> > TIFF in ACR and load the TIFFs in PTGui?
> >
> > If it's the former (loading the RAWs): this is the expected
> behavior.
> > ACR doesn't actually modify the raw files when you adjust the
> exposure.
> > It just changes some metadata. This metadata is specific to the
> > algorithms in ACR, so PTGui cannot read it.
> >
> > You can tell PTGui to boost the exposure using the Post
> Processing tab
> > in the Panorama Editor window.
> >
> > Kind regards,
> >
> > Joost Nieuwenhuijse
> > www.ptgui.com <http://www.ptgui.com> <http://www.ptgui.com
> >
> > Hi Hugh,
> >
> > Are you loading the raw files in PTGui? Or are you converting
> them to
> > TIFF in ACR and load the TIFFs in PTGui?
> >
> > If it's the former (loading the RAWs): this is the expected
> behavior.
> > ACR doesn't actually modify the raw files when you adjust the
> exposure.
> > It just changes some metadata. This metadata is specific to the
> > algorithms in ACR, so PTGui cannot read it.
> >
> > You can tell PTGui to boost the exposure using the Post
> Processing tab
> > in the Panorama Editor window.
> >
> > Kind regards,
> >
> > Joost Nieuwenhuijse
> <http://www.ptgui.com>>
> >
> > On 7/11/26 01:25, Hugh Brown wrote:
> > > I have been lightening my exposures in Photoshop ACR (Adobe
> > Camera Raw)
> > > prior to stitching.
> > >
> > > But when I pull them into PT Gui afind that the exposure has
> > darkened
> > > considerably from the files ingested.
> > >
> > > I have unchecked the box for Perform Automatic Exposure
> and Colour
> > > Adjustment in the Project Settings.
> > >
> > > Any thoughts as to solution?
> > >
> > >
> > > --
> > > 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%2Bunsu...@googlegroups.com>
> > <mailto:ptgui%2Bunsu...@googlegroups.com
> >
> > On 7/11/26 01:25, Hugh Brown wrote:
> > > I have been lightening my exposures in Photoshop ACR (Adobe
> > Camera Raw)
> > > prior to stitching.
> > >
> > > But when I pull them into PT Gui afind that the exposure has
> > darkened
> > > considerably from the files ingested.
> > >
> > > I have unchecked the box for Perform Automatic Exposure
> and Colour
> > > Adjustment in the Project Settings.
> > >
> > > Any thoughts as to solution?
> > >
> > >
> > > --
> > > You received this message because you are subscribed to
> the Google
> > > Groups "PTGui Support" group.
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> from it,
> > send
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Hugh Brown
Jul 11, 2026, 7:53:43 AM (3 days ago) Jul 11
to pt...@googlegroups.com
I loaded say ten stacked images of 10 frames each and they mirrored the original raw frame exposures - about two stops less than- rather than the corrected exposures. So significantly darker than what i loaded.
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Hugh Brown
Jul 11, 2026, 8:41:41 PM (2 days ago) Jul 11
to pt...@googlegroups.com
Hey Mate
Yeah, that's correct.
See attached two screen shots - one from Bridge and then other from PTG.
I think you mentioned at some point in our interactions that I can lighten in PTG. That doesn't work for me because I'm usually stitching multiple row panos - sometimes three rows - and they are blends between dusk and then the night sky. So PTG, other than doing the stitch, can't handle the exposure differential. Which is not a problem as I have a good workaround.
The main issue is the winding back of the exposures on already adjusted images to what they were originally shot at. See attached.
Cheers. Hugh.
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PTGui Support
Jul 12, 2026, 2:48:22 AM (2 days ago) Jul 12
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Hi Hiugh,
Can you load just one of your tiff files in a new PTGui project? Is it
just as dark?
> <http://www.ptgui.com>> <http://www.ptgui.com <http://www.ptgui.com>
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Can you load just one of your tiff files in a new PTGui project? Is it
just as dark?
On 7/12/26 02:41, Hugh Brown wrote:
> Hey Mate
>
> Yeah, that's correct.
>
> See attached two screen shots - one from Bridge and then other from PTG.
>
> I think you mentioned at some point in our interactions that I can
> lighten in PTG. That doesn't work for me because I'm usually stitching
> multiple row panos - sometimes three rows - and they are blends between
> dusk and then the night sky. So PTG, other than doing the stitch, can't
> handle the exposure differential. Which is not a problem as I have a
> good workaround.
>
> The main issue is the winding back of the exposures on already adjusted
> images to what they were originally shot at. See attached.
>
> Cheers. Hugh.
>
> On Sat, Jul 11, 2026 at 7:50 PM 'PTGui Support' via PTGui Support
> <pt...@googlegroups.com <mailto:pt...@googlegroups.com>> wrote:
>
> So if you load a single one of your TIFF files in PTGui, it is showing
> darker than when you load the same image in another application?
>
> Kind regards,
>
> Joost Nieuwenhuijse
> www.ptgui.com <http://www.ptgui.com>
> Hey Mate
>
> Yeah, that's correct.
>
> See attached two screen shots - one from Bridge and then other from PTG.
>
> I think you mentioned at some point in our interactions that I can
> lighten in PTG. That doesn't work for me because I'm usually stitching
> multiple row panos - sometimes three rows - and they are blends between
> dusk and then the night sky. So PTG, other than doing the stitch, can't
> handle the exposure differential. Which is not a problem as I have a
> good workaround.
>
> The main issue is the winding back of the exposures on already adjusted
> images to what they were originally shot at. See attached.
>
> Cheers. Hugh.
>
> On Sat, Jul 11, 2026 at 7:50 PM 'PTGui Support' via PTGui Support
> <pt...@googlegroups.com <mailto:pt...@googlegroups.com>> wrote:
>
> So if you load a single one of your TIFF files in PTGui, it is showing
> darker than when you load the same image in another application?
>
> Kind regards,
>
> Joost Nieuwenhuijse
>
> On 7/11/26 13:15, Hugh Brown wrote:
> > All exact same exposures mate. Exposure compensation already
> unchecked
> > in blending. 13 seconds every single one of the 100 or so images.
> >
> > On Sat, 11 Jul 2026 at 16:44, 'PTGui Support' via PTGui Support
> > <pt...@googlegroups.com <mailto:pt...@googlegroups.com>
> On 7/11/26 13:15, Hugh Brown wrote:
> > All exact same exposures mate. Exposure compensation already
> unchecked
> > in blending. 13 seconds every single one of the 100 or so images.
> >
> > On Sat, 11 Jul 2026 at 16:44, 'PTGui Support' via PTGui Support
> > <pt...@googlegroups.com <mailto:pt...@googlegroups.com>
> <mailto:pt...@googlegroups.com <mailto:pt...@googlegroups.com>>> wrote:
> >
> > You might have images with different exposures mixed into the
> same
> > project. If Exposure Compensation is enabled, PTGui will
> brighten the
> > darkest exposure and darken the brightest exposures to get
> them on the
> > same exposure level. This might be what you are seeing.
> >
> > Try disabling Exposure Compensation in the Blending tab in
> the Panorama
> > Editor.
> >
> > Kind regards,
> >
> > Joost Nieuwenhuijse
> >
> > You might have images with different exposures mixed into the
> same
> > project. If Exposure Compensation is enabled, PTGui will
> brighten the
> > darkest exposure and darken the brightest exposures to get
> them on the
> > same exposure level. This might be what you are seeing.
> >
> > Try disabling Exposure Compensation in the Blending tab in
> the Panorama
> > Editor.
> >
> > Kind regards,
> >
> > Joost Nieuwenhuijse
> > <http://www.ptgui.com <http://www.ptgui.com>>>
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Erik Krause
Jul 12, 2026, 11:39:54 AM (2 days ago) Jul 12
to pt...@googlegroups.com
Am 12.07.2026 um 02:41 schrieb Hugh Brown:
> See attached two screen shots - one from Bridge and then other from PTG.
The small Adjusted-Icon top right of each image suggests, that
> See attached two screen shots - one from Bridge and then other from PTG.
you processed those TIFFs in Camera Raw. If yes, Bridge will show the
brightness as adjusted there, not the brightness all non-Adobe-programs
will show. To get them with the correct brightness into PTG you will
need to save them from ACR.
--
Erik Krause
http://www.erik-krause.de
Hugh Brown
Jul 12, 2026, 8:06:20 PM (2 days ago) Jul 12
to pt...@googlegroups.com
Hi Joost
Yeah, when I load a single image into PTG it is loading it as originally shot and not as adjusted.
Re Erik's message...
Okay, that makes sense. I will try that next 36 hours and revert back.
Thanks for your help.
Cheers. Hugh.
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