Per-block scaling is derived from the LoRA's own deltas — which blocks it put
energy into — so it is a property of the adapter, not of the architecture. Two
things made it LTX-only anyway:
The gate required image_model in {ltxv, ltxav} and mode ltx2, so a model
FunPack had not heard of got the global fallback without anything ever reading
its weights. Whether per-block can run is now discovered from the patches:
fewer than two numbered blocks and the existing fallback takes over, as before.
The key pattern only matched transformer_blocks.N. — MiniMax H3 names its
stack blocks.N., so even with the gate open every H3 patch counted as global
and per-block would have been a silent no-op. The pattern now covers blocks,
transformer_blocks, double_blocks, single_blocks, joint_blocks and layers.
The semantic anchors (PAG 14, STG 14/19) were absolute indices measured on
LTX's 28-block DiT and meant nothing on a stack of another depth. They are
positions now; a 28-block model still resolves to exactly 14 and 19, so LTX
behaviour is unchanged, and a deeper stack gets the equivalent blocks.
Declines, loudly, when a model numbers blocks in two separate stacks
(Flux-style double/single): both start at 0, so one scale would land on two
unrelated blocks.
Untested on a real model — local runs cannot load one. 13 new tests, 11 of
which fail against the previous code.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
