Noise Layer [Replace] 🎭🅐🅓

Noise Layers are the pack's custom noise-scheduling system - the README's phrase for it is "custom noise scheduling via Noise Types, Noise Layers, and seed_override/seed_offset/batch_offset." Chain several together and you're building a deliberate noise recipe instead of accepting one flat draw from the sampler. Of the three noise-layer nodes in this pack, this is the simplest: no weighting, no blending math, just "this layer's noise fully replaces whatever was there before, within its region."

How it compares to its siblings

Add Weighted and Normalized Sum both blend a new noise layer in on top of previous ones, at either an open-ended weight or an automatically-balanced proportion. This node skips blending entirely - wherever it applies (globally, or within a mask_optional region), its noise simply overrides whatever the previous layer in the chain had there. That makes it the right choice when you want a clean override rather than a mix: forcing a specific region of the frame to use a different noise type or seed behavior than the rest of the clip, without the previous layer's contribution leaking through underneath it.

The inputs and outputs that matter

Required: batch_offset (default 0) - shifts which frame this layer's pattern starts from, noise_type - the noise-generation strategy for this layer, seed_gen_override - how this layer derives its seed independent of the base sampling seed, and seed_offset (default 0).

Optional: prev_noise_layers (NOISE_LAYERS) to chain this on top of an earlier layer (which it then overrides, rather than blends with), mask_optional (MASK) to restrict the override to a region instead of the whole frame, and seed_override (default 0) for a fully explicit seed rather than an offset.

Output is a single NOISE_LAYERS, which only fits Sample Settings' noise_layers input.

How to install it

ComfyUI Manager: search AnimateDiff Evolved, confirm the author is Kosinkadink, install, restart. Manually:

cd ComfyUI/custom_nodes
git clone https://github.com/Kosinkadink/ComfyUI-AnimateDiff-Evolved

then restart. No model download tied to this node - pure noise configuration on top of whatever motion setup you already have working.

Common issues & troubleshooting

Added this layer and the previous one's noise still seems to show through. Check that prev_noise_layers is actually chained in correctly and that mask_optional, if set, covers the region you expect - a mismatched or missing mask means the override isn't happening where you think it is.

Expected the whole frame to change but only part did. That's mask_optional at work - leave it unconnected for a full-frame override, or double-check the mask's coverage if you only wanted part of the frame affected but got the whole thing (or vice versa).

You actually wanted a blend, not a full override. Wrong node for that - this one is override-only by design. For a controlled blend with previous layers, use Add Weighted if you want manual control over the mix ratio, or Normalized Sum if you'd rather it stay automatically balanced without extra tuning.