"It's also present whether I render with shadows or not."

This leads me to believe it has something to do with the scenerio I mentioned in my post above, and not the shadows. However, I don't know that it could be refraction artifacting since Poser doesn't use photons or caustics, but i'm thinking it has something to do with the settings of your glass material. Perhaps a screen capture of the material node would help rule that out also.

Another possible solution to remedy this might be to increase the raytrace bounces in Firefly render settings to something above the normal recommended value, which I believe is 4 in production mode. It will impact rendertime, but you can try increasing that value to 6 or more and you should see an improvement as well. In other apps, black artifacting in refracted materials is the result of a lack of ray depth, which this might resolve.

Message edited on: 07/24/2004 21:35

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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.