Vertical lines seen while playing Assassin's Creed IV on PS4?

[SvennoJ]

I haven't noticed and graphical glitches in AC4 with prolonged play. I do see a lot of glitches in NFS rivals, up to whole sections of background briefly flashing pink in the distance. One time when the servers were down textures weren't streaming in right turning the whole screen into a nightmarish flickering mess. Fixed by switching to single player. Made me paranoid about my ps4 too for a second. I guess it was mad it couldn't reach the cloud :p

Fine vertical lines point more towards a tv scaling issue. Do you have the tv set to dot by dot or native mode eliminating all overscan? It can also be the HDMI connection. With the ps3 and pc switched though my amp on a few occasions it got into a weird mode with all kinds of little white horizontal lines in the picture, as if the colors are clipping or something. Switching inputs removes it.

My tv is getting old and suffers from horizontal banding issues. Not noticeable during most games, but very visible when you get smooth gradients in games like Journey and Flower.

That's the price you pay for getting pristine 1080p output, any flaw in the display is going to stand out now :/