Register MPC for Reset

Reset a Material Parameter Collection to its defaults when the visual closes

Blueprint node

Category: XRLIVE | ACTORS

Registers a Material Parameter Collection (MPC) asset to have all its scalar and vector parameters reset to their default values when the visual closes.

Pin	Type	Description
MPC	UMaterialParameterCollection*	The MPC asset to register

Example

Event BeginPlay
    ↓
Register MPC for Reset
    MPC: MPC_VisualGlobals

Then later in your visual, change MPC values freely:

Set Scalar Parameter Value (MPC_VisualGlobals, "Intensity", 0.8)
Set Vector Parameter Value (MPC_VisualGlobals, "Color", ...)

When the visual closes, all parameters are automatically restored to the default values stored in the MPC_VisualGlobals asset.

Notes

• Register the MPC once on Event BeginPlay — you only need to call this node once per MPC regardless of how many times you write to it.
• The defaults are read from the MPC asset itself (the values shown in the asset editor), not from when you registered it.
• If multiple visuals share the same MPC, always register it so each visual starts from a known state.