The same sectors as Figure 4 for the diffusion stage alone (harmonized sampling; ρ = 0.65, 0.61, 0.61, and 0.63) and HelioFill (0.57, 0.51, 0.54, and 0.60), with the three-view target. The diffusion stage, a squared-error estimate, renders enclosed active regions as smooth patches at their approximate positions; the refinement stage adds small-scale texture of realistic amplitude that carries no positional information below ≈5﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩6 (Appendix C) and lowers the correlation.