Bug: selection not holding for decimation

[BvC_Prod]

I'm needing to surgically decimate and smooth sections of a model, am attaching a snip of a sample selection followed by a snip of the result after applying Decimate Selection, which is obviously applied to a much broader region than desired. I played with much smaller selections, with each of the selection tools, same result, not always the identical larger selection, but consistently way larger, and most often identical.

Thanks for assisting.

Benjy

[anil_mistry]

Hi @BvC_Prod

Thank you for participating in our Community! Would you be able to share these photos for further investigation?

Thank you and have a great day!

[BvC_Prod]

Hello Anil,

This model was reconstructed from photos outside of Recap Photo and brought in to edit, idea being to project textures back to edited model in 3rd party app. The photos are certainly at the root of the problem regarding the misalignments, holes, noise, etc. or rather the homogenous textures themselves are to blame for something any photogrammetry engine won't deal with very well, but my answer to that is to simplify the geometry along the planar surfaces and project back to those shapes what's in the photography, see if the results are acceptable. 

So, my focus is how best to use the tools in Recap Photo to this end of editing just the geometry, seems the selection tool is acting unpredictably. I thought maybe the rectangle tool and lasso selecting through the camera-facing polys to the back might inadvertently be broadening the selection, but even the brush exhibits this undesired behavior. Thanks for advising.

Benjy

[murali.p]

Hi Benjy,

It looks like decimation is happening as expected, but the issue is likely around regenerating the level of details. We tested on few datasets and are unable to repro similar behaviour. If possible, please share the dataset.

Regards,

Murali

[BvC_Prod]

Hello Murali,

It's still syncing to my Google Drive, but here's the download link:

https://drive.google.com/open?id=0By_RLgJrf2yRdXA0bS0yTTJOYmc

You know, what would be so useful here, a pen tool used to select vertices that when closing a loop grabs all the interior polys. This would make minced meat of the job cleaning noisy data resulting from homogeneous textures across planar subject matter, e.g. white doors and cabinet faces, encountered in photogrammetry and so common to artificial environments. Just a thought, okay a whine 

Many thanks.

Benjy

[BvC_Prod]

So, I see I've not been tapping the full functionality of the lasso tool. I had only been click dragging it, now see that one can click on points to make very precise selections of polys, Enter to finalize selection, which is what I was driving at with the pen tool idea. Nice. But then what? If I right-click to bring up the tool box and select Smooth under Refine, I don't see any change and don't see a panel to control Smooth settings. The Smooth Surface Tool, is what I want, but then lack the precise selection of polys with the lasso. Any thoughts?