Better still, could you show the (advanced) material room screenshot for one of the material zones both before and after you apply the MAT pose? The MAT pose appears to be doing something, so it would be useful to know exactly what it does to the default shader.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)