auto_config measures the subject in subject_mask -- width, height, travel, size
change, per-frame step -- and derives crop mode, crop scale, mask grow/blur,
paste feather and latent dilation from it. Every amount in this node is in
pixels, and a pixel only means something relative to how big the head is in
frame: the same 8 px is generous on a distant head and invisible on a close
one, and that mismatch is what leaves a seam.
The mask is the OLD head, so growing it by a fixed fraction only moves the
clip when the new head is wider or has more hair. The reference's proportions
are measured (identity_image's aspect against the mask's) and decide WHERE the
slack goes; its absolute size cannot be measured at all -- a cropped head
carries no scale -- so that part is identity_headroom, default 1.15. Growth is
anisotropic: up and sideways, never down into the neck and collar, which stay
the guide's own pixels. The margin between mask and crop border is a budget:
the grow takes what it needs, the feather gets half of what is left, floored --
a ramp wider than its share fades the head itself.
Two fixes for state that outlived a run:
- the transformer_options written into the guider are now undone in a finally.
The guider belongs to another node and survives in the execution cache, so
the reference latents stayed reachable (VRAM never freed) and a later run
that did not overwrite the same keys sampled with the previous clip's specs.
- chunked clips move each sampled chunk to the offload device as it comes out,
instead of holding all of them on the sampling device.
40 tests, including that each side grows by exactly its own amount (the pad is
mirrored: padding the top grows the mask downward) and that the feather never
reaches past the margin it has.
alisson-anjos
f4af1cae69