You mean if you connect a 3D BluRay player directly to your TV? So long as the TV does 3D, this will work. The 3D receiver is simply acting as a switching device to make it easly to connect multiple devices to your TV, and the 3D comes into play to pass the 3D data to the TV. Also, the receiver's primary function in the above case is to provide surround sound from the BR player. If you don't need or want surround sound, then connecting directly to the TV will work.
If I run my HDMI from the source to the 3DTV, is there any need for a 3D receiver?