There seems to be a bug in the Sketchup16 Preferences OpenGL Settings.
Sometimes when you check “Use hardware acceleration” it displays the wrong options in the “capabilities list” and no hardware acceleration is used.
My Graphics card is a NVIDIA GeForce GT 520/PCIe/SSE2.
It supports 3 “capabilities” Numbered as 16, 28, and 40. I use 40.
They differ only in antialiasing.
If I turn off hardware acceleration, The capabilities are numbered 101 and 102.
Check it again and the numbers are 16, 28 and 40.
BUT if I uncheck hardware acceleration and CLOSE the System preferences window.
Open the window again. It shows 101 and 102. Now check the Use hardware acceleration
IT SHOWS two new .capabilities numbered 13 and 63. Click details to see that these options are NOT hardware accelerated (Microsoft NOT Nvidia)
So you think you have hardware acceleration but you don’t.
You have to close the preferences window again and open it to get back to the correct list.
Try it out on your configuration and see if you get similar results. It may be a problem only on some hardware configurations.
Somehow I got set to #63 when I configured my new SU16.
If I’m correct this could be a big problem for the SU16 release.
I checked SU 15 and it had the same problem. But I didn’t make the wrong selection when I configured it.