There is a bug with Poser Pro's (And maybe Poser 7's, too) P4 renderer.

After you open Poser and load your figure, render ONCE with Firefly and RAYTRACING in the MANUAL settings enabled.
You don't have to let the render finish, but it will unlock the P4 renderer's ability to render shaders correctly.

Except for effects based on actual raytracing, the "new" P4 render engine is as good as Firefly (and FASTER) in correctly displaying shaders.

But you first have to give it a poke by rendering once with FF.
Otherwise it will behave like the "old" P4 renderer and just tint M4's skin blue.
It will also render diffuse colors way darker than shown in the preview.
Again, this behaviour is gone once it is "unlocked" by a raytraced render.

If you close the scene and start a new one, you have to unlock the P4 renderer again.
If you open a saved "unlocked" scene fom a pz3 file, the P4 renderer stays unlocked.