I'm trying to model radiation of a glass body at 450degC to a steel sheet at 20degC (no conduction between the two), and have simplified the model to just two sheets, with surface to surface radiation and emissivity values of 0.9 (glass) and 0.8 (steel). After 10 mins in transient studies, the mesh itself seems to massively affect temperature values, and seems not be a question of how fine, but more