Rendering problems

we started the rendering later then we planned.

we were deciding on whether to use

-Renderfarm which rendered out in layers, compositing it back using after effects. But there was such a cue that it became Ridiculous. A couple of times we tried use a test clip that was done before using the Renderfarm didn't work for unknown reason.

-Maya Software .

we wanted to use mental ray to render our work because it had a more better look to our city building. But we knew that it would take much more time to render then maya software. so we used the maya software rendering instead.