nDisplay sync not working... halp!

Hey,

Managed to get nDisplay working here at work, on our 3x3 screen grid in stereo.

Our render node has three video cards in it, the top row of 3 screens is run by the first video card, the middle row of 3 screens by the second video card and the bottom row of 3 screens by the third video card.

Problem I’m having is that the syncing between the rows is hugely out of sync even with [general] swap_sync_policy=2 in the config file. When we look around in the level there is very noticeable tearing between the three rows.

We have a 20x4 Cave2 downstairs that I’d love to deploy UE4 in, but there’s no point writing up a config file for that until we solve these sync issues : /

Help us Epic wan kenobi, you’re our only hope!