On builds of master (x86 on Windows from TB62) between 2015-12-08 and 2015-12-11 the 3D rendered transitions seem to have stopped displaying. Either they are just too fast to perceive, or they are not actually redrawing the display.
Which GPU and drivers do you have?
DeviceString: NVIDIA Quadro K2000
This hardware and driver--transitions render correctly with Windows 32-bit builds from TB62 trhough 2015-12-08, are bad starting with 2015-12-11 Windows 32-bit builds. No TB build 9th or 10th
So this does also affect builds other than Windows
On Fedora 23 w/LXDE (as guest on VMWare Workstation 12 on Windows 8.1) and
Build ID: 8a342e9f6ad701bd46ecca1c3d270ef2d9670d44
CPU Threads: 1; OS Version: Linux 4.2; UI Render: GL;
TinderBox: Linux-rpm_deb-x86_64@70-TDF, Branch:master, Time: 2015-12-16_12:23:28
Locale: en-US (en_US.UTF-8)
No 3D slide transitions. Unfortunately for this build, no opengl_device.log being written to settings/cache directory.
Since I closed Bug 91583, is it related?
Might go back and identify the work on the GL transitions that cleared this at new year. But for now closing WFM.