SG161222/SPARK.Chroma_v1

SPARK.Chroma — Model for Realistic Image Generation

Overview

SPARK.Chroma is a fine-tuned model designed for generating realistic images. Based on the Chroma1-HD model with 8.9B parameters and Apache 2.0 license.

Warning: This model was trained using test fine-tune configuration — outputs may lack realism and fine detail.

Start Date Feb 25, 2026

Last Update May 3, 2026

Local Equipment CPU: Intel Core I5-12400; GPU: RTX 4090 (24GB); RAM: 128GB; SSD: M.2 NVMe 1024GB

Dataset Size ~2500 Images [512/1024]

Training Time ~ 88h 20m [STEP1] ~ 109h 40m [STEP2]

You can support me directly on my Boosty

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How to Use

For ComfyUI:

• Place the ae.safetensors in the following path: ComfyUI_windows_portable\ComfyUI\models\vae
• Place t5xxl_fp16.safetensors in the following path: ComfyUI_windows_portable\ComfyUI\models\clip
• Place the SPARK.Chroma_v1_1024.safetensors in the following path: ComfyUI_windows_portable\ComfyUI\models\unet or ComfyUI_windows_portable\ComfyUI\models\diffusion_models
• Load the BasicWorkflow.json into ComfyUI and run

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Optimal Generation Settings

• Sampling Method and Schedule Type: dpmpp_2m simple
• Sampling Steps: 40
• CFG Scale: 3.5-4.0
• Negative Prompt: low quality, ugly, unfinished, out of focus, deformed, disfigure, blurry, smudged, restricted palette, flat colors, noisy, artifacts, fake, generated

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Limitations

• This version of the model does not have a variety of styles and is intended for realism.
• There may be issues with anatomy and text.