helle everyone,
i have a problem in all viewport types, but especially rendered one, all things are messed up, i can see all lines and things behind the surfaces and this makes very hard me to work on my project, like this:
this is my rendered view:
but when i take render it is like this
it looks normal.
my graphic card is amd radeon hd 7870 , and i think it is pretty good card, all drivers are up to date, i tried almost everyting on the internet.
i changed all options, i make them like my firends rhino options, it didn’t work, i tried testZBiasFactor i decreased it nothing happened, i incresed it to 30000 then it looks very close to normal but then i can’t select any object on viewport.
if you can help, you will make me very happy, and you’ll save my project 
edit: i am using rhino 5
