Thank you. I've tried those values but the noise keeps appearing U_U

I have tried tweaking every setting, even to the point of not just turning off the lighst but deleting them just in case their mere existence was the cause. All I get is some difference in the noises's "seed".

My point is I've seen around a lot of renders done with mesh lights and none showed this noise nor anybody mentioned finding this problem. Does it happen only to me? Is there some kind of weird incompatibility between Poser Pro 2014 and my motherboard and/or OS? Then why it happens in Poser 11 too? It makes me mad because besides that fact mesh lights behave wonderfully. Look at those soft shadows.