Update: Removing Oodle doesn’t totally fix it. This is some sort of low level, ongoing editor malaise…
Objects becoming black and shiny, is caused by textures suddenly appearing as black in the content browser. Doing almost anything ( opening them, for instance ), will fix it.
Textures suddenly becoming very low res. Again, a little more is needed to fix it. Changing almost anything in the texture editor will do the trick.
It’s almost like the editor randomly chooses 5-10 textures each time you start it, and decides they will be black / low-res. Very annoying.
Turning off Oodle does seem to make it happen less, but does no eradicate the behavior entirely.