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    Fast Chroma w/ Upscaler, Refiner and Face detailer [Low VRAM] - v1.4
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    So, here’s how I roll: this workflow generates a little Chroma image with txt2img, upscales and refines it for some extra polish with FluxRefinerV1.1 with img2img, and gives faces a nice touch-up (Face Detailer). On my trusty laptop (rockin’ an RTX 3070 with 8GB VRAM and 40GB RAM), it makes a 1120 x 1120 pic in about 180 to 280 seconds —depending on the prompt, as I said in my previous workflow, I’m new to ComfyUI, so if you’ve got any tips or tricks, I’m all ears! On the bright side, at least I didn’t make a huge Spaghetti Monster this time!

    Models:

    CLIPs:

    VAE:

    LoRA:

    • None

    Upscale models:

    Custom nodes:

    • comfyui-uscape-by-model

    • comfyui_memory_cleanup

    • comfyui-vrgamedevgirl-main

    • comfyui_essentials_mb

    • comfyui-impact-pack

    • comfy-image-saver

    Description

    I'm placing this in Flux1 D, because there's no "Chroma" category.

    FAQ

    Comments (6)

    blobby99Aug 29, 2025· 2 reactions
    CivitAI

    Here via your Reddit post. You actually make me interested in Chroma for the first time. But dear lord, those teeth in your example renders. What on Earth did the people responsible for the face refiner use for training data?

    When I had a RDNA 1 AMD GPU, I was able to use full flux D at near 1MP with an acceptable render time. It is better to have the initial render at an optimal resolution for the underlying model. For images you really like, I would recommend upscaling with SeedVR2- just alter a workflow from video (which no home GPU has enough VRAM for anyway) to a single image input! If you like face detail, SeedVR2 will blow you away.

    ArtificeAIAug 29, 2025· 1 reaction

    The Flux Refiner model version 1.1 says it has trouble with teeth, so that may be the culprit.

    gabrielx
    Author
    Aug 30, 2025

    @ArtificeAI I might try 1.5 in an updated workflow

    wzgrxAug 31, 2025
    CivitAI

    lora sup?

    animewrongdoer157Sep 15, 2025· 2 reactions
    CivitAI

    To vastly improve results:

    - Download the ChromaHD gguf (will allow you to generate 1024x1024). Then feed in 1024x1024 latents.

    -Put in a RescaleCFG node before the samplers

    -Using ddim+ddim_uniform sampler scheduler

    MetaGenNov 29, 2025

    Do you mind elaborating on rescale cfg nodes?

    Workflows
    Flux.1 D

    Details

    Downloads
    1,226
    Platform
    CivitAI
    Platform Status
    Available
    Created
    8/28/2025
    Updated
    5/4/2026
    Deleted
    -

    Files

    fastChromaWUpscalerRefiner_v14.zip

    Mirrors