# Flatten image mask reducing circle size **URL:** \ **Category:** LightBurn Software Questions\ **Tags:** sculpfun, windows10, windows, image, clipping-mask\ **Created:** [October 13, 2024, 9:33am UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412 "2024-10-13T09:33:02Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![steveh70](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/8c91f0/32.png) [@steveh70](https://forum.lightburnsoftware.com/u/steveh70)\ **Post date:** [October 13, 2024, 9:33am UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/1 "2024-10-13T09:33:02Z")
Hi, This is my first issue ive had with this excellent software, so just hoping its something I’m missing!! The Flatten image mask option with a circular tool path seems to be reducing the size of the circle once completed. I use this for my clocks and its only started happening within the past day or two- I do my usual routine with the picture, but it reduces the circle size…Only a fraction, but its noticeable! from 220 to a lower size, so it looks slightly flat at the top and sides. Running on a windows 10 pc and sculpfun s30 pro/ Any help appreciated Thanks. ---
**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\ **Post date:** [October 13, 2024, 11:47am UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/2 "2024-10-13T11:47:30Z")
Hello Steven Welcome aboard 😃 Would it be possible to provide 2 Lbrn LightBurn files One with the image+shape prior to flattening and one after flattening? ---
**Author:** ![steveh70](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/8c91f0/32.png) [@steveh70](https://forum.lightburnsoftware.com/u/steveh70)\ **Post date:** [October 13, 2024, 2:16pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/3 "2024-10-13T14:16:12Z")
Hi, Yes no problem. This happens to every picture but this one is less severe measurement wise! Thanks ![applymasktoimage](https://forum.lightburnsoftware.com/uploads/default/original/3X/f/6/f69fc6c43d4c8091468d152aade3a43cb7bc9aba.png) ![flattenimagemask](https://forum.lightburnsoftware.com/uploads/default/original/3X/5/4/54f77602ba42179ab8bddd15f803941c6b07ac05.png) ![measurements](https://forum.lightburnsoftware.com/uploads/default/original/3X/0/b/0b254f1c6074ce4d15f97d644d8bc6487cad59cc.png) ---
**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\ **Post date:** [October 13, 2024, 2:21pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/4 "2024-10-13T14:21:34Z")
I do not seem to be able to replicate Maybe you could provide the LBRN files, please? ---
**Author:** ![steveh70](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/8c91f0/32.png) [@steveh70](https://forum.lightburnsoftware.com/u/steveh70)\ **Post date:** [October 13, 2024, 2:23pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/5 "2024-10-13T14:23:23Z")
Hi, Thanks for the welcome. Do you think a re-install might fix it, as i can give that a go first? ---
**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\ **Post date:** [October 13, 2024, 2:24pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/6 "2024-10-13T14:24:46Z")
Doubt reinstall would make a difference. I am interested more on what is causing the issue on your file, hence why requested the LBRN prior and after the flattening. Could be something that is there, but i am just not doing the correct steps to replicate. ---
**Author:** ![steveh70](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/8c91f0/32.png) [@steveh70](https://forum.lightburnsoftware.com/u/steveh70)\ **Post date:** [October 13, 2024, 2:29pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/7 "2024-10-13T14:29:34Z")
ok, i just do the usual. Create the circle and change to T1 then import the picture into Lightburn. Then apply and flatten the image mask. I just did one at 200mm width and it cut that short aswell. [callieimage.lbrn2](https://forum.lightburnsoftware.com/uploads/short-url/x3OSPR2SBHVwklBbHUGQkdEYH5b.lbrn2) (1.7 MB) thanks ---
**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\ **Post date:** [October 13, 2024, 2:33pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/8 "2024-10-13T14:33:08Z")
It is showing 199.989 mm for me ![image](https://forum.lightburnsoftware.com/uploads/default/original/3X/c/c/cc8bee475e0726cf0091a2594010e366a4427d23.jpeg) That might be in the margin of error of the line thickness. That’s like a drop of 0.005% 😃 Is that the difference you are seeing as well? ---
**Author:** ![steveh70](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/8c91f0/32.png) [@steveh70](https://forum.lightburnsoftware.com/u/steveh70)\ **Post date:** [October 13, 2024, 2:37pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/9 "2024-10-13T14:37:11Z")
Yes, but the measurement differs. Some are worse than others and really noticeable. I can find a way around it if needs be, but thought id highlight it. ---
**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\ **Post date:** [October 13, 2024, 2:44pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/10 "2024-10-13T14:44:51Z")
While I agree there is a difference, It cannot be in any way shape of form noticable in a practical sense as we talking about 0.00x mm Your laser will not have such a definition. Numerically its different yes, I will inquire about why this difference happens. ---
**Author:** ![steveh70](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/8c91f0/32.png) [@steveh70](https://forum.lightburnsoftware.com/u/steveh70)\ **Post date:** [October 13, 2024, 2:58pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/11 "2024-10-13T14:58:33Z")
Hi, Id be interested to know why this happens, seeing as it never did before. I can work around it for now. Thanks for the help. ---
**Author:** ![MikeyH](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/43a26b/32.png) [@MikeyH](https://forum.lightburnsoftware.com/u/MikeyH)\ **Post date:** [October 13, 2024, 6:45pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/13 "2024-10-13T18:45:30Z")
> [@steveh70](#): > > seeing as it never did before Sounds like @gilaraujo is detecting a rounding error. Is it possible you did just not notice it before, or there were changes the location of your drawing slightly in the workspace. As Gil sort-of said, micrometer errors in a millimeter world are not worth worrying about. ---
**Author:** ![system](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/system/32/64335_2.png) [@system](https://forum.lightburnsoftware.com/u/system)\ **Post date:** [November 12, 2024, 6:45pm UTC](https://forum.lightburnsoftware.com/t/flatten-image-mask-reducing-circle-size/153412/14 "2024-11-12T18:45:41Z")
Closed on November 12, 2024, 6:45pm UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.