3 monitor cabinet mode help...

[slykrysis]

I've spent way too long trying to get this working...

See pics for how my monitors are setup: pics

I've looked at the guide here but it only details 2-monitor setups.

Toggling the "Backglass Repositioning" and "DMD Repositioning" in the cabinet mode settings doesn't do anything to either display, respectively. I was under the impression that turning it on/off would make the screens show a blank/black image, but nothing happens when I do it, just shows my Windows wallpaper on each monitor still.

What am I doing wrong here?

[AcadDude]

My settings are below. Notice the negative values in vertical positions. 1844 almost makes sense as adding the vertical dims of 2 and 3 equals 1848

I have my three monitors set the same orientation as yours. 1 on bottom in portrait and then 3 landscape then 2 landscape. #1 is 1080x1920 #2 is 1920x1080 #3 is 1366x768
My settings for FX cabinet are:
Orientation: 0
Dot matrix repositioning: On
Dot matrix horizontal position = 12
Dot matrix vertical position = -650 (notice negative value)
Dot matrix horizontal size = 1360
Dot matrix vertical size = 350
Backglass repositioning: On
Backglass horizontal position = 0
Backglass vertical position = -1844 (notice negative value)
Backglass horizontal size = 1920
Backglass vertical size = 1080

[AcadDude]

I think the dot matrix vertical location of -650 is to 768-650 = 118 pixels down from the top of the DMD monitor. Makes sense as the monitor is blocked to almost 1 to 4 aspect ratio

[slykrysis]

Thanks, after fiddling around with orientations and positioning settings, I was able to get it working, see here: https://imgur.com/a/8RgdNwM