--- license: apache-2.0 pipeline_tag: text-to-image language: - en base_model: - lodestones/Chroma1-HD --- # 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] > **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

# How to Use **For ComfyUI:** * Place the [**ae.safetensors**](https://huggingface.co/SG161222/SPARK.Chroma_preview/blob/main/ae.safetensors) in the following path: **ComfyUI_windows_portable\ComfyUI\models\vae** * Place [**t5xxl_fp16.safetensors**](https://huggingface.co/SG161222/SPARK.Chroma_preview/blob/main/t5xxl_fp16.safetensors) in the following path: **ComfyUI_windows_portable\ComfyUI\models\clip** * Place the [**SPARK.Chroma_v1_1024.safetensors**](https://huggingface.co/SG161222/SPARK.Chroma_v1/blob/main/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**](https://huggingface.co/SG161222/SPARK.Chroma_preview/blob/main/BasicWorkflow.json) into ComfyUI and run

# 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

# 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.