// Run the operator const float SmoothStrength = 0.2; if (SmoothBoneWeights.Validate() ==EOperationValidationResult::Ok) { for (const int32 VertexID : VerticesToSmooth) { TMapFinalWeights; SmoothBoneWeights.SmoothWeightsAtVertex(VertexID, SmoothStrength, FinalWeights); // Use FinalWeights to modify your weights