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Update (Dec 2024): With the new release, it is no longer necessary to perform Generative Remove Operations prior to Cropping.
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@valentinosh: "i do it to remove a face and in the place it generates new faces...lots of time those stuf doesnt work, creating lots more of work"
If you select a face but leave parts of the body unselected, even parts that are disconnected, Remove will generate a replacement that tries to match that body. Select all of the body along with the face.
See this short article for how to remove objects more reliably:
https://www.lightroomqueen.com/generative-remove-replace/
Most complaints about Remove are addressed in the article. But if it doesn't help, please attach a full-resolution JPEG exported from the unmodified original photo (not a screenshot). With nearly every one of the many dozen problem photos posted here, we've been able to show how to quickly remove the desired objects.
"why not put a tab , with the old options ? like cloning and stuff"
The older Clone, Heal, and Content-Aware modes are still available:
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Often, Remove doesn't match tones well in flat tonal areas, as in your example. Sometimes you can fix that by selecting a larger area:
(You can get rid of the newly added wall outlet with a second application of Remove.)
Other techniques for ameliorating a tone mismatch: make the selection more raggedy; use short strokes with the Heal tool around the boundary to get better feathering; use the Brush mask and set Texture, Clarity, and Sharpness low to blur the area.
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@CedricSimon: "I am trying to understand why my generative remove attempts are sometimes very blurry compared to the rest of the photo, even with small patches. It was the case in all my session yesterday. For some reason, today, simply regenerating the same spots gives better results (but still blurry)."
Generative AI Remove often doesn't match the surrounding noise/grain with replacement patches. Sometimes running Denoise first significantly improves the match. If that doesn't help, please attach a full-resolution JPEG exported from the unmodified original photo (not a screenshot) and attach a screenshot showing what you've selected for Remove. That will let us see more precisely what the issue might be.
"I have the feeling Photoshop does better here, at least, is more consistent."
PS and LR use the same Adobe Firefly Generative AI Remove, though their user interfaces are different, and they have different other remove modes (e.g. Heal, Clone, and Content-Aware in LR). So when comparing Generative Remove in the two apps, in LR make sure you've got Remove mode selected with Use Generative AI selected:
and in PS make sure Mode: Generative AI On is selected:
If you encounter an example where Generative Remove behaves differently in the two apps, it would be good to post an example here (with unmodified, full-resolution JPEGs). To date, no one has posted an example where the two apps differ.
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@Tom de Kort "I tried to remove a tree on the right side. The generative remove yields unusable results: the sky is completely off."
Many have observed here that the replacements made by Generative Remove sometimes don't match the photo's tone or noise, especially with smooth gradients like your sky. To get better matches, these techniques sometimes help:
1. Adobe recommends applying Denoise before Remove. This can reduce the noise, making it more likely the replacement will match.
2. The replacement patch supplied by Adobe Firefly has a maximum size of 2048 x 2048 pixels. If the selected area in the photo is larger than that, then the replacement patch gets upscaled (and blurry). Try removing smaller selections if possible.
3. Conversely, try making a larger selection, even including the entire background. Upscaling of the replacement sometimes won't be noticeable then.
4. Sometimes there's a distinctly visible boundary where the tone or noise don't match. You can often use the heal tool around the boundary to get better feathering and make it less noticeable -- apply Heal in small brush strokes. Or use a Brush mask with maximum feathering, dropping local Texture, Clarity, and Sharpness to their minimum values. Sometimes, making a very raggedy selection around the object makes the boundary less noticeable.
5. For grain/noise in particular, see this post for how to ameliorate the problem by adding the grain back or reducing the grain:
https://community.adobe.com/t5/lightroom-classic-discussions/p-generative-remove-feedback-lr-classic...
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With your screenshot, I got pretty good results with step 3, selecting most of the sky except the sun's corona (which I assume you want to preserve):
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