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.