topic Re: Part of the sketch is disappearing when adding a line in Fusion Support Forum

Part of the sketch is disappearing when adding a line

jonasgeiser — Wed, 05 Nov 2025 18:48:48 GMT

Hi,
New to Fusion 360 and trying to make a LED Sign. But when editing the sketch, adding a new line, some parts of the sketch is disappearing. What am I doing wrong here?

Thanks.

Re: Part of the sketch is disappearing when adding a line

jeff_strater — Wed, 05 Nov 2025 19:21:57 GMT

I don't think you are doing anything wrong. I suspect that some curves get solved unexpectedly when you create the new line. Can you share the design here?

Re: Part of the sketch is disappearing when adding a line

jonasgeiser — Wed, 05 Nov 2025 19:43:36 GMT

Hi, thanks for the quick response, for example it happens when connecting the bottom under the "X"

thanks

jonas

Re: Part of the sketch is disappearing when adding a line

jeff_strater — Wed, 05 Nov 2025 21:10:35 GMT

Thanks for sharing the design, @jonasgeiser - I did not realize at first that the geometry was generated from a sketch offset. It seems that there is a bad bug with offset on this design. As you've seen, closing that triangle under the X causes bad things to happen. Also, if I change the offset distance at all, even worse things happen. I will create a bug for this. In the meantime, if you delete the offset, it does seem to get rid of the problem (at the cost of a bunch of dimensions being added to the sketch). Not sure if that is OK with you, but I thought I'd offer it:

(view in My Videos)

Edit: The Fusion bug is: FUS-224303 Thanks for reporting it.

Re: Part of the sketch is disappearing when adding a line

jonasgeiser — Thu, 06 Nov 2025 09:25:17 GMT

Hi Jeff,

that works for me, thanks for the quick help, really appreciate it.

Have a nice day 🙂

Jonas