How to move texture UV offset

Development Rendering
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6

Thanks to RVillani and NoobsDeSroobs, this is now working ([Animated GIF; 47.2MB][1]).

I basically used the set-up suggested by RVillani, exposing UOffset and VOffset as parameters and then using a Material Instance for the starfield material.

The base C++ CameraActor class does the movement:

FVector Position = GetActorLocation();
FVector Diff = Position - LastPosition;
LastPosition = Position;

if (StarfieldMID) {
    float UOffset, VOffset;
    if (StarfieldMID->GetScalarParameterValue(TEXT("UOffset"), UOffset) &&
        StarfieldMID->GetScalarParameterValue(TEXT("VOffset"), VOffset)) {
        UOffset += Diff.X * UVOffsetScale;
        VOffset -= Diff.Z * UVOffsetScale;

        StarfieldMID->SetScalarParameterValue(TEXT("UOffset"), UOffset);
        StarfieldMID->SetScalarParameterValue(TEXT("VOffset"), VOffset);
    } else {
        UE_LOG(LogGame, Error, TEXT("[%s] Failed to get U/V offset parameter values"), *GetName());
    }
}

and the blueprint-subclass creates the Material Instance Dynamic in the BeginPlay event and passes it to the base class:

104579-materialinstancesetup.png
104579-materialinstancesetup.png1384×670 151 KB

I don’t think using a Material Parameter Collection was at all straight forward and I didn’t see what advantage it gave me over a material instance as I will be adding a total of 3 textures to the starfield to give a parallax effect and MPCs seem to be global, unless I have misunderstood their use? Thanks anyway for the suggestion.