There had been bug 88959 and bug 45618 discussing the missing 3D slide transitions on Windows. In fact, they are not missing, but just not in the default install set of LibreOffice 4.4. The option "OpenGL transitions for LibreOffice Impress" need to be activate in Optional Features during the install procedure of LibreOffice. -> Please add 3D slide transitions on Windows into the default install set.
Andras Timar committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=5f4443255386ed205abec7f69f820244d94cd288 tdf#89135 install OpenGL slide transitions unconditionally on Windows It will be available in 4.5.0. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Thanks a lot!