It stepped the full distance to sigma_next and then added
sqrt(sigma^2 - sigma_next^2) of noise on top. That is the VP variance
formula, and adding noise without shortening the step leaves the latent
noisier at sigma_next than the schedule defines — so s_noise never behaved
like euler_ancestral on H3 or LTXAV at any value.
Lands short (sigma_down) and renoises with flow matching's alpha rescaling:
the arithmetic _sample_const_rf_full already carried, and comfy's
sample_euler_ancestral_RF. At s_noise=1.0 it IS euler_ancestral.
s_noise now means eta (fraction of the step taken stochastically); range
raised to 1.0 so euler_ancestral is expressible. A value carried over from
before does NOT mean what it did — the tooltip says so. Non-CONST models
keep the eps path unchanged. Audio still never gets ancestral noise.
digital-garbage
e966b0ab19