CyberZiT Scheduler

ComfyUI-CyberZiT

CyberZiT is a lightweight preset sigma scheduler for ComfyUI. It was designed for Z-Image Turbo and is also tested with Anima-Turbo.

It adds:

• a CyberZiT Scheduler node with fast, balanced, and quality presets;
• four CyberZiT entries in the normal KSampler scheduler menu;
• an optional detail control when using the standalone scheduler node.

CyberZiT has no additional Python dependencies and does not download models or make network requests.

Installation

ComfyUI Manager

Open ComfyUI Manager, search for CyberZiT Scheduler, install it, and restart ComfyUI.

Git

Open a terminal in ComfyUI/custom_nodes and run:

git clone https://github.com/cyberdeliaAI/ComfyUI-CyberZiT.git

Restart ComfyUI after installation.

Manual installation

Download this repository as a ZIP, extract it, and place the resulting folder at:

ComfyUI/custom_nodes/ComfyUI-CyberZiT

Restart ComfyUI. No requirements.txt installation is needed.

Quick start

Normal KSampler nodes

Select one of these entries in the existing scheduler menu:

• cyberzit_fast
• cyberzit
• cyberzit_balanced
• cyberzit_quality

cyberzit is an alias of cyberzit_balanced. All four menu entries use the neutral detail=0.0 setting.

Useful starting points:

| Model | Steps | CFG | Sampler | Scheduler | | --- | ---: | ---: | --- | --- | | Z-Image Turbo | 8-9 | 1.0 | euler | cyberzit_quality | | Anima-Turbo | 8-12 | 1.0 | euler | cyberzit_quality |

These are starting points rather than fixed requirements. cyberzit_balanced is a useful alternative when you want a milder schedule.

SamplerCustomAdvanced

Add CyberZiT Scheduler from:

sampling > custom_sampling > schedulers

Connect its SIGMAS output to the sigmas input of SamplerCustomAdvanced. The node exposes:

• steps: number of sampling steps;
• preset: fast, balanced, or quality;
• detail: a small adjustment to the selected trajectory.

Presets

| Preset | Flow shift | Behaviour | | --- | ---: | --- | | fast | 1.0 | Exact linear 1.0 -> 0.0 trajectory | | balanced | 1.75 | Mild shift; a middle ground between directness and structure | | quality | 3.0 | Retains more sampling points in the high and middle sigma regions |

The detail control fine-tunes a preset without changing its identity:

• 0.0 keeps the calibrated preset unchanged;
• negative values retain more of the high-sigma structure phase;
• positive values allocate more of the path to low-sigma refinement.

detail is available only on the standalone CyberZiT Scheduler node. It does not need to be configured elsewhere. Refiner steps, CFG, denoise, and the sampler remain settings of your workflow and are not changed by CyberZiT.

How it works

Every CyberZiT curve:

• contains exactly steps + 1 sigma values;
• starts at 1.0 and ends at 0.0;
• is strictly descending;
• is deterministic, making presets easy to compare with the same seed.

The scheduler changes only the sigma trajectory. It does not replace the sampler and does not modify the model, prompt, CFG, denoise, or latent.

Troubleshooting

The CyberZiT entries do not appear in KSampler

Update ComfyUI and restart it. CyberZiT uses ComfyUI's scheduler registration API for the KSampler menu. If that API is unavailable in an older build, the standalone CyberZiT Scheduler node remains usable with SamplerCustomAdvanced.

Existing workflows

The registered names are intentionally stable. Workflows using cyberzit, cyberzit_fast, cyberzit_balanced, or cyberzit_quality can continue using those exact names.

Development

The schedule mathematics is isolated from ComfyUI and PyTorch. Run the test suite with:

python -m unittest discover -s tests -v

License

MIT