Interactive Rendering Issue

[leehumphries]

Running Production Rendering Mode - Renderer Vray RT 3.60.03 - GPU (cuda) tested with just the 1080 and Hybrid.
I cant seem to get an override material to work. If i dont click Interactive Mode and just hit render then override works.

Any ideas

[svetlozar.draganov]

IPR uses ActiveShade settings, just switch to ActiveShade enable OverrideMtl there and apply the same shader as the one in Global Switches rollout: