Inferred B_∥ from the spatially-regularized WFA of Bifrost synthetic data for different values of noise σ and regularization parameter α. The top row shows the same B_∥ map from the MHD model for reference. The remainder of the grid presents results for increased regularization parameter (from left to right) – where the first column is the equivalent of the classical WFA – and increased noise level σ (from top to bottom).