To clarify. Powder is 1810kg/m3 which melts to a liquid at 2760kg/3 and then solidifies to a solid at 2704kg/m3?
What material sits in the gaps in the powder?
You may need to move the UDM checks outside of the DEFINE_PROPERTY macro, and then be more careful with the IF statements.
What are you trying to model?
You are navigating away from the AIS Discovery experience