Why does my mesh change when i render it? I'v created an animation with a simple displace modifier and textures and it looks just fine in rendered view, but as soon as I hit "render" it deforms to this low poly mess. What am I doing wrong?
Modifiers can be disabled in viewport and/or render. The subsurf and multires modifiers also have different settings for render and viewport.

The camera icon controls the render view and the eye icon controls the viewport.