vertical seam line only with TIFF export (PTG P13.6)

[twalp]

Using version 13.6 PTGui Pro. 

When I export a particular 50502x25251 equirectangular (a common size for me) project, the results are fine if I choose jpeg output, but if I export as tiff and then view it in PTGui Viewer there's a black vertical seam line from nadir to zenith. I haven't seen this in a long time. 

[PTGui Support]

Hi,

This looks like a bug in the TIFF export! Could you post your project
file (just the .pts)?

Thanks
Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

On 3/7/26 13:56, twalp wrote:
> Using version 13.6 PTGui Pro.
>
> When I export a particular 50502x25251 equirectangular (a common size
> for me) project, the results are fine if I choose jpeg output, but if I
> export as tiff and then view it in PTGui Viewer there's a black vertical
> seam line from nadir to zenith. I haven't seen this in a long time.
>

> ptgui tiff seam line.jpg
>
>
>
>
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[Tim Wilde]

After reading your reply I opened the PTGui project and clicked "Align Images" in step 2 of Project Assistant. It was a stab in the dark move because the earlier jpeg export had already looked fine in Viewer. I then went to Create Panorama and noticed that the Width x height values differed from their earlier values. Now they're 50536x25268, whereas the previous iteration was 50502x25251.

I exported the project to tiff and tested it in Viewer. No seam!

Sorry. I do not understand what happened, but second Align Images pass apparently fixed whatever went wrong. 

Question: during the first pass through PTG I did some exposure tweaks in PTG after the initial alignment. Does doing an align images after dark areas have been opened up in PTG affect the alignment process? I should think Align Images works with the original images, which are unaffected by exposure tweaks in PTG, but otherwise the answer must be: magic! 

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[Tim Wilde]

YIKES!   Wrong again, sort of.

I wrote my reply after clicking the View...  button on the Create Panorama page. There was no seam visible.

But after sending my email to you, I opened the tiff file in PTG Viewer and there's the seam!  To be absolutely specific: I right-clicked on the tiff in Finder and selected Open With... > PTGui Viewer.  That's what I had done when I originally submitted my post about the seam.

Attached is a screenshot showing the two instances of PTG Viwer (Both v 2.10) side by side. 

So I just opened the tiff in another macOS app, Spherical Viewer. No seam.

The ball is in your court.

[PTGui Support]

Hi Tim,

So the TIFF file is correct, but the PTGui Viewer shows the black seam?

Could you post your project file (just the .pts) so I can try to
reproduce this?

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

On 3/7/26 18:55, Tim Wilde wrote:
> YIKES!   Wrong again, sort of.
>
> I wrote my reply after clicking the View...  button on the Create
> Panorama page. There was no seam visible.
>
> But after sending my email to you, I opened the tiff file in PTG Viewer
> and there's the seam!  To be absolutely specific: I right-clicked on the
> tiff in Finder and selected Open With... > PTGui Viewer.  That's what I
> had done when I originally submitted my post about the seam.
>
> Attached is a screenshot showing the two instances of PTG Viwer (Both v
> 2.10) side by side.
>
> So I just opened the tiff in another macOS app, Spherical Viewer. No seam.
>
> The ball is in your court.
>

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

>
> On 3/7/26 13:56, twalp wrote:
> > Using version 13.6 PTGui Pro.
> >
> > When I export a particular 50502x25251 equirectangular (a
> common size
> > for me) project, the results are fine if I choose jpeg
> output, but if I
> > export as tiff and then view it in PTGui Viewer there's a
> black vertical
> > seam line from nadir to zenith. I haven't seen this in a long
> time.
> >
> > ptgui tiff seam line.jpg
> >
> >
> >
> >
> > --
> > 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>
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> <mailto:ptgui%2Bunsu...@googlegroups.com>>.

> > To view this discussion visit https://groups.google.com/d/

> msgid/ptgui/ <https://groups.google.com/d/msgid/ptgui/>
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> <http://40googlegroups.com> <https://
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> > utm_medium=email&utm_source=footer>.
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[PTGui Support]

On 3/7/26 18:21, Tim Wilde wrote:
> Question: during the first pass through PTG I did some exposure tweaks
> in PTG after the initial alignment. Does doing an align images after
> dark areas have been opened up in PTG affect the alignment process? I
> should think Align Images works with the original images, which are
> unaffected by exposure tweaks in PTG, but otherwise the answer must be:
> magic!

That's correct, Align Images uses the original unmodified source images.