I tested with a simple new scene, it works.
but come to this one, i redo everything still not working....wierd..
and i assume I selected the right option when you say "fixed to the camera"

made mistake fixing the image plane to the camera. will try again and let u know the result later. Thanks!!!

after rendering:

render_cam view:

from persp view see the relationship of camera, imageplane and objects.

hi, i'm a beginner to maya and I'm trying to render a scene with image plane background. However in the render window the texture or the image of the image plane always come infront and block the...