Thanks for the reply! No, that is not checked. Plus, that is for the Superfly Renderer and none of those cached renders are Superfly. Any new renders preview and export fine. It's just the previous renders that were in the 'Recent Renders' window from the previous version of Poser are affected.

I guess an image would have helped... Yes, the atmosphere shows up, I just want a sort of grainy, dusty effect to the light rays...

Thanks Phil! 

Opps! That should have been edited! I cannot edit that post now, or remove those pics..

Thanks for the responses and procedures! What does that do to the file size? I have this model already in .obj format, even though the geometry is identical the FBX is half the size of the .obj.  At over 500MB, the .obj just won't import and if it did it would be too big to use. The falcon you show pictured is not the same model, this one has a full geometry modeled cockpit and 250 4K textures.. I basically just spent 12 hours in Poser and re-rotated, translated, scaled, and re-parented everything. I still have a few parts left to reposition but this is it so far!

Thanks for the replies! DCArt, those Superfly nodes are just for Superfly right? I don't render using Superfly at all... I am absolutely not a fan of it as a renderer, if I need PBR, I jump over to DAZ and use Iray... This is some weird effect with this geometry I think? (Although I don't see how) Anything else with no specular or reflection node would render flat in Firefly no matter how much light was on it.... It would 'blow out' maybe, but it wouldn't look glossy and definitely shouldn't have a reflection...

Problem Solved! It turns out it was a problem with the Atmosphere Volume_Noise setting! Some kind of conflict with the SSS. I turned down the Noise to 0 but had to lower the StepSize to compensate which increased the Rendering time. Still, got rid of the splotchyness.....! Thanks for all the tips and suggestions!

Hmmmm... Does anyone else have it?

Hey thanks! That skin looks pretty good! It's a little dark to see it well, but I get that that's the mood you were going for. My problem with SF is the grainyness. Does that go away if you render longer? A lot of images I see rendered in SF are grainy like this..

Yes that does look nice. But on the whole, so far people have looked terrible in Superfly.... Do you have any exaples with characters in it that look good? I did a quick render of my hall scene in SF, but even the stone walls looked bad. I would need to redesign all the materials for SF.

Will that script run in Poser 12? Python 3 unfortunately tanked a lot of good scripts....

I think I should clear up a few things... One, I do appreciate everyone who responded. You took the time to weigh in and try to help me out, so thank you! Second, my shader does not just work for me in one specific lighting or environment. It works like 90% of the time, which is why I was confused when I got these splotchy artifacts in the first place. I don't have, or know what 'EZskin' is. If you look at post 22 you'll see that I did try a simple Scatter setup based on suggestions but still got the same artifacts. I also tried to render just a small 1" square of the scene with Irradiance Caching turned off, but after 2 hours (as Richard60 predicted) I had to cancel it because it had not even finished the precalculations so I guess that isn't really a viable strategy... I just tried primorges suggestion of adding a low intensity point light (below render). It did minimize the splotchyness some but did not eliminate it, and also changes the scene lighting away from what I was originally after. It's somewhat disappointing because I was really liking the lighting in the hall before I added a figure. I used a half cylinder with the front half set as a light emitter around each of the hall lights, I don't know how I would achieve that same effect using real lights. I could probably simulate it with 3 spotlights apiece but that would add 24 lights to the scene....

Thanks for the tips! I had a feeling it might be the irradiance caching.... Incidentally, If you look closely, you'll notice that the 2 diffuse maps are not the same. One has red lips, and one has natural lips. I was blending the two to have a slightly red lip....

Here's a more normal light set up with my shader...

Thanks for all the feedback! I realize There may be some weirdness in my shader setup, but primorge is correct in that the Scatter is definitely working.I'm not looking to redo my shader setup as I am pretty satisfied with how it normally renders in Firefly. I think my skin has decent depth and detail. I never render in Superfly because I've yet to see something rendered in it that didn't look either flat or grainy... I also don't use the Gamma correction in Firefly as I feel like it also flattens out the contours of the figure by washing out the shadows..... It just my preference. I am willing to look into what is and isn't working in my shader because of those Indirect lighting splotchy artifacts that I've been getting on my current renders...But, here is a very basic Scatter setup, still showing the splotchy artifacts......