Created attachment 178442 [details] file to reproduce the problem Open attached document and save it to "ODF 1.3" and to "ODF 1.3 (extended)". Validate the file. In both cases you get the validation error attribute "draw:extrusion-specularity" has a bad value: the value does not match the regular expression "([0-9]?[0-9](\.[0-9]*)?|100(\.0*)?|\.[0-9]+)%". This is a follow up to bug 145700. That commit keeps values higher than 100% from doc import for better interoperability. But such values are not allowed in ODF. The request for changing ODF is in https://issues.oasis-open.org/browse/OFFICE-4122. In the meantime we need to use loext namespace in "ODF 1.3 (extended)" and restrict the value to the allowed range in "ODF 1.3".
Regina Henschel committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/c893c0e359b82be71107e064bd2266c6daff81d7 tdf#147580 use valid values for extrusion-specularity It will be available in 7.4.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.