I have had no issues with superfly renders with poser 13  until I updated to the 13.0.296. Now my renders only reach half the samples and  the sample bar speeds to completion, leaving a grainy render. I've used a higher sample count with no success. any advise would be helpful. thanks 

Are you using adaptive sampling? You might reduce that or turn it off.

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I use Poser 13 and win 10

The recent update mussed up adoptive sampling numbers in the presets a bit. All are set too high. Lower sampling rate to something like 0.002, and try again.

Also play around with lights, I fund its a lot more sensitive to light placement and setting.