I am playing the demo to see if i want to get this game and subscribe. However no matter what graphic settings I use some items wont show up, trashcans, mail boxes, and some of the 1st things you kill in the tutorial, the little egg sack things. also some objective items are invisible as well, like the command console in the tutorial. This problem is enough to make me NOT get the game, everything else is nice. what can i do to fix this graphical issue?

How do you know they are there but invisible?

What mean is, what are you using to determine they exist vs they are just dead or despawned and haven't come back yet?

I mouse over them and it lets me pickup the trashcan in this case, over my head, my hero is holding what looks to be an invisible trashcan. the posture is holding and object over head. also i can select theese items and attack them in the case of the console, wich is a quest objective. so that was anoying to find. also some parts of bigger objecs dont show up or i can see through them at certain angles.

I'm not familiar with that specific error. I think maybe you should try updating your direct X and especially your video card drivers though.

Also, you should probably go ahead and hop down to the technical forums where the mods/devs who monitor that stuff might be able to offer some better advice.