Text is vector in After Effects and stays sharp at any Scale. Here a
text layer was drawn at its font size and the bitmap resampled by Scale
unless Continuously Rasterize was on, so text grown with Scale went soft.
This reworks #200 (reverted in 29c4d3a for kinetic_typography).
Why kinetic_typography failed: its time remap key at 1.9 s sits on
frame 23 (1.917 s), so main-comp 0.3 s shows the precomp at 1.6026 s,
but the test compared it with the precomp rendered at 1.6 s. The moving,
motion-blurred title already differed by 0.89 of the 1.0 mean-difference
budget on main (0.987 in all); with continuous rasterisation the "Sub"
line, whose expression scale is 84.00 % at 1.6 s and 84.105 % at
1.6026 s, falls on either side of the 2^-1/4 quarter-octave step and was
drawn at 0.84 at one time and at 1.0 at the other, pushing the total to
1.075.
Fix: raster_scale treats text layers as always continuously rasterised
(shape layers and vector footage still follow the switch), and rounds
the quarter-octave step up past rounding noise only: an unscaled layer
at a fractional position measured its scale as 1 + 1e-15 and was
rasterised at 2^1/4, softening unscaled text. The QA test now compares
the remapped precomp with the precomp at the time the remap really
shows (read back from the property): difference 0.63, all of it the
title's motion blur, the Sub line identical.
Tests: tests_collapse::text_scaled_up_stays_sharp_without_the_switch
(from #200: 10 px text at 800 % matches 80 px text),
tests_collapse::unscaled_text_rasterises_at_the_output_scale (fails
without the noise tolerance), automation qa kinetic_typography.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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