Rendering produces a completely transparent image with no objects I have a scene with animated objects. In 3d view and camera view i can see them perfectly with material and textures

but every time i render (F12) i get this result

just a transperent screen
i tried to put the objects into another scene/project but they didn't appear
also it once said there aren't any objects in there...
Start with pycoder's comment (I can't comment because I'm new to Stack Exchange).

Also check the camera's clipping settings. Select the camera, Properties Window > Camera Tab > Lens > Clipping. The values are blender's units and the default is 100 (way too short in many cases).