ScaleOnTheFly's collapsed-scale guard ran, and then StillsPartialityRefine
re-fitted every crystal's scale with no floor and adopted it unconditionally
whenever the image had no prior CC - which is exactly the state the guard leaves
behind. So the guard was protecting almost nothing. Measured on a lysozyme jet
dataset: of 367 images it left unscaled, only 8 were still unscaled in the
output, and 53 reached the merge at or below a fiftieth of the run median, the
worst at a 4525th; on a second run of the same sample, 297 images, worst at a
75000th. Those intensities are what the merge saw - up to 94x too high in the
written file.
Run the guard again on the refined scales. It now reports 367 then 51 on that
dataset, and the merge improves: R-meas 117.4 -> 110.8%, CC1/2 96.3 -> 96.5%.
Measurements confirm the rest of the guard is right as it stands: 0.02 is ~5x
below the lowest scale ever seen on an image that correlates with the merge
(no image at CC >= 0.4 falls below a tenth of the median), and leaving the image
at G = 1 beats both dropping it and replacing its scale with the median - on a
run where 30% of images are affected, dropping costs 1.8 CC1/2 and 29%
multiplicity.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 5
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