HiDream I1 Fast
Generate images quickly with HiDream I1 Fast - Lightweight version with 16 inference steps, ideal for rapid previews on lower-end hardware.
简介
HiDream I1 Fast is a lightweight text-to-image workflow tuned for rapid previews and low-VRAM GPUs. It pairs the HiDream I1 Fast FP8 UNet (loaded with UNETLoader) with SD3-style sampling (ModelSamplingSD3) and runs just 16 inference steps in KSampler. Prompts are handled through QuadrupleCLIPLoader and CLIPTextEncode, while EmptySD3LatentImage creates the starting latent at your chosen resolution. The result is a fast, responsive pipeline that’s ideal for exploring ideas and iterating on compositions without long waits.
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在 ComfyUI 中运行。 此工作流无法在本页面运行。你可以在 Comfy Cloud 中打开（已预先加载所需内容），或下载后在自己的 ComfyUI 中使用。
在 Cloud 中试用常见问答
Keep steps at 16, lower resolution in EmptySD3LatentImage, reduce batch size to 1, and ensure you’re using the FP8 model (hidream_i1_fast_fp8.safetensors). Larger images and higher steps raise memory use.
The ModelSamplingSD3 shift balances conditioning across the multiple text encoders used by HiDream/SD3-style models. Start near 3.0 (official guidance) and adjust slightly if prompts feel over/under-strong.
The workflow is sampler-agnostic. Per HiDream’s notes, uni_pc with a simple scheduler is a reliable default. If you need different behavior, try Euler or DPM++ variants and compare results at the same step count.
Increase steps moderately (e.g., 20–24), refine your positive/negative prompts, tweak shift (±0.5), and consider a slightly higher resolution. Also set a fixed seed in KSampler for reproducible tuning.