Created attachment 162890 [details] Example with shape with extrusion ON The attached odp file has a custom shape "5-point Star" for which the extrusion in ON, so that it gets a 3D look. Open attached file and save it to pptx. Open resulted file in PowerPoint. Notice, that the star is flat. Open the odp file in PowerPoint. You see a 3D-star. So PowerPoint is able to work with the 3D state. Only LibreOffice does not export it correctly.
confirm in Version: 7.0.0.1 (x64) Build ID: 04ba7e3f1e51af6c5d653e543a620e36719083fd CPU threads: 4; OS: Windows 10.0 Build 18362; UI render: Skia/Raster; VCL: win Locale: ru-RU (ru_RU); UI: en-US Calc: threaded and in 5.2 I think it never worked starting from OOo
The bug is still present in this version of Libre Office: Version: 7.6.0.0.alpha1+ (X86_64) / LibreOffice Community Build ID: 20873f073ae4a9478f0a84355f779a2176bd2ec8 CPU threads: 4; OS: Windows 10.0 Build 19045; UI render: Skia/Raster; VCL: win Locale: fr-FR (fr_FR); UI: fr-FR Calc: CL threaded