why do i have these rough lines

[anonymous_user_e2a53f0f1 (anonymous_user_e2a53f0f)]

any one know why i have these rough lines in simple box geometry

Thanks

[Deathrey (DeathreyCG)]

Aliasing

[anonymous_user_e2a53f0f1 (anonymous_user_e2a53f0f)]

Thanks, that fixed it