Custom nodes for LTX-Video support in ComfyUI

ComfyUI-LTXVideo


    The Advanced STG Guider implements sophisticated techniques for controlling the denoising process:

    It creates a dynamic mapping from scheduler-defined sigma values to CFG and STG (Spatio-Temporal Skip Guidance [1]) parameters.
    This approach establishes distinct sigma value ranges that operate independently of step numbers, allowing precise control over:
    • CFG scale
    • STG scale and rescale factors
    • STG attention layer skipping patterns

    The guider also supports:
    • CFG-Zero* [2] rescaling, which dynamically adjusts negative predictions based on the dot product between positive and negative signals
    • Threshold-based noise prediction zeroing for steps with sigma values exceeding a specified threshold

    For example if the sigma ranges are defined as [1.0, 0.9, 0.85, 0.6] and the CFG values are defined as [4, 3, 2, 1] and STG scale values
    are defined as [2, 2, 2, 1] and STG rescale values are defined as [1, 1, 1, 1] and STG layers indices are defined as [[14, 17], [14, 16], [14], [14]], then the guider will:
    - use CFG=4, STG scale=2, STG rescale=1 and STG layers indices = [14, 17] for sigma in the range (0.9, 1.0]
    - use CFG=3, STG scale=2, STG rescale=1 and STG layers indices = [14, 16] for sigma in the range (0.85, 0.9]
    - use CFG=2, STG scale=2, STG rescale=1 and STG layers indices = [14] for sigma in the range (0.8, 0.85]
    - use CFG=1, STG scale=1, STG rescale=1 and STG layers indices = [14] for sigma in the range (0.6, 0.8]

    The guider will use the same parameters for the same sigma values, regardless of the step number.

    References:
    [1] https://arxiv.org/abs/2411.18664
    [2] https://arxiv.org/abs/2503.18886

    

ComfyUI Node: 🅛🅣🅧 STG Guider Advanced

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Extension: ComfyUI-LTXVideo

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