Just a guess, but it would seem to me like each mirrored plane in the scene is trying to reflect not only the object of the woman, but also each other's reflections of that object. What are your raytrace bounces set at? The problem here, as you might know, is that in real life if you reflect a mirror in another mirror, the reflections can go on indefinitely. Obviously, this is a problem for computer software, which is limited by the number of reflection bounces it can trace. Have you tried setting the bounces lower/higher to see if changing the reflection depth in either direction helps this?

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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.