Setting Solid Emissivity
 

I'm currently using the S2S model to model a gray enclosure which has 5 different surfaces. The only problem is that ANSYS does not allow me to set the "internal emissivity" for the solid regions, only the fluid regions. I was wondering if anyone can help with this regarding, whether or not, I can set the internal emissivity for the solid regions.

Thank you,
Yus310