--- license: apache-2.0 pipeline_tag: text-to-image language: - en base_model: - lodestones/Chroma1-HD --- # SPARK.Chroma — Model for Realistic Image Generation ![SPARK.Chroma_preview Demo Image](image.png) # 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 is a preview release and does not yet reflect the full vision — outputs may lack realism and fine detail, and in some cases it may be inferior to Chroma1‑HD. Future releases will use different fine‑tune settings to improve quality.

START DATE: October 14, 2025

LAST UPDATE: October 30, 2025

DATASET SIZE: 2400 Images

EQUIPMENT: 1 x RTX 4090 (24GB)

TRAINING TIME: ~ 116h 40m

> ### You can support me directly on my Boosty

# 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_preview.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

# 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.