The following are some of the diagnostic messages Maya software rendering displays:
         
            -  Motion blur and raytracing are both turned on. (Reflections, refractions and shadows are not motion blurred.)
- You have motion blur turned on. Be aware that particles, lights and shadows do not motion blur. As well, motion blurred shadows
               may produce artifacts. 
            
-    You have specified output to the Quantel format. In previous versions of Maya, this format only outputs to NTSC/PAL/HDTV resolutions,
               and does not output to fields. If the above restrictions are not met, rendering defaults to IFF image output.
            
-  You have specified output to the Cineon format. This format does not render out a mask channel. 
- You have specified a fractional animation by-frame step. This results in images over-writing each other for fractional frame
               counts. Please remember to turn on the modify-extension.
            
- Near/far clipping values are too far apart. You may encounter numerical imprecision resulting in incorrect renders.
-  There are no renderable cameras in the scene.