If your IDL Intensity is set too high, this can contribute to this type of glow artifact too.

Use the Dimension 3D advanced render settings script to reduce the IDL intensity. I tend to go with max IDL intensity of 0.5 these days. Sometimes lower, e.g. As low as 0.15. even.

That was following advice from Bagginsbill regarding Poser's diffuse levels being way to high, proportionally... and so, the way to counter this, when using IDL, is to lower the IDL intensity.

Out of interest, is that a Point light that is casting the shadow on the figure?