Vertical and Horizontal Transform functions in Lightroom Classic

[ItWasNotMe]

Lightroom Classic 7.0, Camera Raw 10.0, MacOS 10.13

Develop Module - Processing RAW images, supported camera, Enable Profile Corrections applied, Constrain Crop applied.

When I use the sliders for Vertical and Horizontal transform, they no longer change the perspective, rather they change the aspect ratio.

So Vertical 'stretches' the image in the vertical direction so its elongated and Horizontal 'stretches' the image horizontally so its widened. I couldn't see any difference now between Horizontal and Aspect.

Did I inadvertently change some setting, or has the behaviour changed. If the latter, where has the perspective correction gone?

[EDIT]

Bizarre - went back to Library module, returned to Develop a different image and the functions are now working normally on that

Go back to Library, select the image I have a problem with, return to Develop, and the behaviour is still wrong,

[richardplondon]

This squeezing / stretching is always in fact happening, but is not always equally apparent subjectively - depending on the picture content, and also on how slight or extreme are the adjustment values you are applying.

Often when we have a lot of "architectural" structure in an image whereby dealing with convergence is the most important thing, we simply disregard how much the overall scene proportions are being pulled around.

Other times, the visual priorities work the other way. And this is strongly exacerbated at wide angle view.

IMO you have simply got one image here, which happens not to produce the pictorial results you want, from these particular forms of adjustment. You would almost certainly have met the exact same difficulty if using a tilt / swing back camera instead. Because it is a geometric / optical issue, not a software issue.

[ItWasNotMe]

I understand that, but this is far more extreme than I have seen on thousands of other images on older versions.

On this image; Auto does a reasonable job without extreme squeezing/stretching but its not quite there, I can't tweak it using the sliders so will have to use guided as even the slightest manual change alters the aspect ratio enormously.

Its not just the one image as I've noticed this effect on others I'm editing today as well. I guess its because some of the verticals barely converge on the images in question, despite their not being wide-angle.

Many thanks

[Todd Shaner · Accepted solution]

This issue appeared after Adobe added the Guide Upright tools in LR CC 2015.6 and 6.6. The longer the lens focal length used the more pronounced the stretching effect. See this post for further details:

Lightroom 6 Transformation Issue

The easiest workaround is to apply 'Full' Upright correction and then use the Transform controls as needed for further adjustments

[ItWasNotMe]

Thats pretty much the situation. Fortunately for the few images it really messes up, I can pretty much get away with guided; irony intended.

[Todd Shaner]

Yep, whatever works best with the image file.