feat(z-image): add Seed Variance Enhancer node and Linear UI integration #8753
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Add a new conditioning node for Z-Image models that injects seed-based noise into text embeddings to increase visual variation between seeds. Backend: - New invocation: z_image_seed_variance_enhancer.py - Parameters: strength (0-2), randomize_percent (1-100%), seed Frontend: - State management in paramsSlice with selectors and reducers - UI components in SeedVariance/ folder with toggle and sliders - Integration in GenerationSettingsAccordion (Advanced Options) - Graph builder integration in buildZImageGraph.ts - Metadata recall handlers for remix functionality - Translations and tooltip descriptions Based on: github.com/Pfannkuchensack/invokeai-z-image-seed-variance-enhancer
Pfannkuchensack
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Jan 10, 2026
| noise = torch.rand( | ||
| prompt_embeds.shape, generator=generator, device=prompt_embeds.device, dtype=prompt_embeds.dtype | ||
| ) | ||
| noise = noise * 2 - 1 # Scale to [-1, 1] |
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Technically this is [-1, 1) as 1 will not be generated by the distribution.
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Python code looks good. Need to get reviews from frontend prior to merging.
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Summary
Add a new conditioning node for Z-Image models that injects seed-based noise into text embeddings to increase visual variation between seeds.
Z-Image-Turbo can produce relatively similar images with different seeds, making it harder to explore variations of a prompt. This feature implements reproducible, seed-based noise injection into text embeddings to increase visual variation while maintaining reproducibility.
Backend:
z_image_seed_variance_enhancer.pystrength(0-2),randomize_percent(1-100%),seedFrontend:
paramsSlicewith selectors and reducersSeedVariance/folder with toggle and slidersbuildZImageGraph.tsBased on: https://github.com/Pfannkuchensack/invokeai-z-image-seed-variance-enhancer
Related Issues / Discussions
Integrates community node as core feature for Z-Image models.
QA Instructions
Workflow Editor:
Merge Plan
No special merge requirements. Schema will be auto-generated on backend start.
Checklist
What's Newcopy (if doing a release after this PR)