@mviars Yeah, I am using SCUMMVM and getting back in to Riven after transferring my 5 CDs that dug out of an old box. It works great. Fullscreen is working fine but it does leave black borders on the left and right sides which I expected.
I am using defaults for video and render, but messing with some of the scale settings yields interesting results for games like DOTT and Full Throttle. Some settings slow down the interface. I am basically using default and OpenGL.
This works great with my 8bitDo bluetooth controllers too. Analog stick moves the cursor. Myst/Riven is pretty fun on the big screen and comfy chair!