cube rotate for multiple monitors extends beyond area that should be drawn

[BloodyIron]

This is a graphical representation of the issue : https://imgur.com/J4xZht3

I have 3x monitors, 1920x1080, all in landscape mode, and all side by side. I use compiz with the cube rotate all the time, but when I rotate, the images spill out the left and right edges of the cube.

This issue is a regression, and I'm not entirely sure when it started, because I've been trying to get this bug addressed for years now, and nobody seems to care.

I'm hoping this is the right place to report this.

[Nicolas Krzywinski (nsk7even)]

I am not quite sure also, but I think it worked in Ubuntu 12.04 and stopped working in Ubuntu 14.04 OR 16.04 (or in non-LTS releases in between). It affects Linux Mint Mate as well.

[FOSS victim #187345 (0penid-deactivatedaccount)]

I am having the same issue - I use the single large 'cube' as a workaround, but sometimes my secondary monitor's contents don't render properly on the cube when rotating with the mouse.

Linux Mint v19