I had a bunch of nodes in there for temporary use, allowing for quick alterations. I removed those to simplify it. This is the body material; it tiles 7.5 times, but all of the head parts would tile at more like 3.

With the billboard behind her, you can see through her in refractive mode, without the inner parts being visible, unless she has her mouth open, in which case you'd see them if looking into her mouth:

It would probably be easier if I made/packaged an mc6 material file, if you can download one.

If she is supposed to look like cooling magma, she could be opaque, which immediately solve the emitter problem. I don't think I have a magma texture, but I think I can generate some asymmetrical seamless tiles with Genetica. You'd want more than one so that the cracks aren't the same every time she is in that mode.

edit, update: Hah! I'm pretty sure I can not only make a cracked/cooling lava asymmetrical seamless tile, but I can animate the transformation from full molten lava through stages of cooling/cracked stony surface, on to human skin. :D Even if you're doing a comic (i.e., still images), this would be useful because you could show Blaze in any stage of transformation.

Poser 12, Poser 13, Poser 14, in feet.  

OSes:  Win7Prox64, Win7Ultx64, Win11

Silo Pro 2.5.6 64bit, Silo 2025.1, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5