Quote - use d3d's FFRender script.

You're talking about this script?

http://d3d.sesseler.de/index.php?software=poserpython&product=render

Sorry, while that's a nice script, all it does is provide a more convenient way to access the settings in Firefly that are already exposed to the user.  There's nothing in there that will help fix blotches or noise, beyond what is already available.

I'm talking about deep level of control over the irradience solution, which would require the ability to tweak interpolation, and adjust raycast parameters.

Let's take the level of exposed control for the user end in something like Vray, as an  example:

http://www.aleso3d.com/blog/wp-content/uploads/2011/11/vray-render-settings-interior-rendering.jpg

The ability to get a perfect marriage of speed vs quality is available to the end user, in abundance.  I'm not suggesting Poser users would want all this control, but we can not achieve good renders in some architectural situations, and that's problematic for advanced users, using Firefly.

This level of control is useful to achieve optimum results in most render situations, using biased render engines and GI.  Unbiased can be far more simple, but that's another story.

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.