band = low-frequency error in L* (lower is better); steps = contour pixels per megapixel

paint full (radius 5), pixel ratio 2
                                      glow             faint             stack        concentric              ring
none                        0.071   16960     0.122   19357     0.258    7590     0.249   12121     0.066    3241 
C0 sin (now)                0.023     776     0.017     331     0.153     208     0.152     779     0.029      86 
C1 sin, no gate             0.023     280     0.017     180     0.077      66     0.082     148     0.023      46 
C3 ign, gate                0.005     574     0.005     137     0.119     137     0.113     499     0.020      83 
C3 ign                      0.005     148     0.005     123     0.008      20     0.009      43     0.014      26 
C4 blue                     0.006     160     0.007      66     0.012      29     0.011      74     0.013      29 
SHIP ign+ign-swap out       0.006      23     0.004       0     0.009       6     0.009      14     0.012       0 
C8 f16+out                  0.002     114     0.001      11     0.003      31     0.003     111     0.003       6 

paint off (radius 0), pixel ratio 2
                                      glow             faint             stack        concentric              ring
none                        0.094   30953     0.136   30268     0.282   23529     0.274   19677     0.077   11048 
C0 sin (now)                0.075      26     0.080      26     0.155      11     0.103      23     0.041     308 
C1 sin, no gate             0.079      37     0.085      46     0.116      26     0.158      46     0.047     143 
C3 ign, gate                0.074      23     0.081      31     0.128       0     0.093      23     0.039      74 
C3 ign                      0.078      20     0.087     108     0.080      11     0.116      26     0.047       3 
C4 blue                     0.078      66     0.087      88     0.078      26     0.101      37     0.049      51 
SHIP ign+ign-swap out       0.076      20     0.087     108     0.074      11     0.111      26     0.049       3 
C8 f16+out                  0.002     114     0.001      11     0.003      43     0.003      71     0.003      11