P: Generative Remove Feedback (Lr Classic & Lr Eco)

I found out 30 minutes later... I must somehow have hit the 'Capacity' ruler...! I don't know when, and have not even noticed that ruler... embarrassing (My excuse: I'm pretty new til LrC 😉 ).

So I am happy again 😉

@planeman320: "Initially main problem being that once you have selected the area to remove the system then creates an area at least twice the size if not more rerquiring constant adaption."

Uncheck Detect Objects -- it doesn't work well, especially with skinny objects and along the edges of photos.  I find it's faster overall never to use it.

"Generative Remove Failed. We've encountered an issue and can't complete your request at this time. Please try again later."

This quite unhelpful error message is shown when LR is unable to contact Adobe's servers, and it usually occurs when firewalls and anti-malware / anti-virus utilities incorrectly block some network requests from LR. Try these troubleshooting steps:

- Temporarily disable all the firewall / anti-malware on your computer. If that solves the problem, then add a specific exclusion for LR to the firewall's rules.

- Connect to another network, preferably one serviced by a different ISP. E.g. a Wifi connection of a neighbor, a coffee shop, work, or your phone's hotspot. Sometimes the routers in these networks block LR's requests, especially in authoritarian countries like China.

@defaultstdw4391cpox: "When using the remove tool to remove a branch, it often leaves either a lighter or darker background color where the branch used to be, so it "removes the branch but leaves the shape of the branch."

If you applied Remove on top of an AI mask (e.g. Sky or Subject mask), do the menu command Settings > Update AI Settings to recompute the mask.  If you didn't apply Remove to an AI mask, please attach a full-resolution JPEG exported from the unmodified original photo (not a screenshot), so we can see the issue precisely.

@AlexJz: "If I do the remove while HDR is on, going back to SDR mode, the replaced portions are almost complete dark. Reverse happens if I do the remove on the SDR version, switching to HDR yields pure white."

I just did a quickie test and didn't observe that. In either direction, the Remove replacement remained well-blended in.  I don't recall any posts about this before, but since HDR editing isn't widely used yet, you may be the first to report a bug or limitation.  

Please upload a sample raw and screenshots showing the precise Remove select you've made and any changes you've made to Basic panel sliders. Upload the raw to Wetransfer, Dropbox, Google Drive or similar free service and post the sharing link here.

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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-amp-lr-eco/m-p/14917497#M382464

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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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@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.

"Instead of removing the imge is being replaced."

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.

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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.