Flux is a state-of-the-art image model. It excels in generating realistic photos and following the prompt, but some styles can be challenging to achieve. In addition to crafting the prompt, supplementing the Flux base model with LoRA models is another valuable trick in your toolbox.
In this article, you will learn how to use up to 3 LoRA models in ComfyUI.
Table of Contents
Software
We will use ComfyUI, an alternative to AUTOMATIC1111. You can use it on Windows, Mac, or Google Colab. If you prefer using a ComfyUI service, Think Diffusion offers our readers an extra 20% credit.
Read the ComfyUI beginner’s guide if you are new to ComfyUI. See the Quick Start Guide if you are new to AI images and videos.
Take the ComfyUI course to learn ComfyUI step-by-step.
Using LoRA on ComfyUI
Step 0: Update ComfyUI
ComfyUI started supporting SD3.5 natively in October 2024. If you haven’t updated your ComfyUI since then, do so now.
The easiest way to update ComfyUI is through the ComfyUI Manager. Click Manager > Update ComfyUI.
Restart ComfyUI and reload the page.
Step 1: Load the ComfyUI workflow
Download the Flux LoRA workflow JSON file below.
Drop it to your ComfyUI.
This workflow uses up to 3 LoRA models but with the third one disabled. I will show you how to enable/disable any one of them.
Step 2: Download the Flux model
Download the Flux1 dev FP8 checkpoint.
Put the model file in the folder ComfyUI > models > checkpoints.
(If you use my ComfyUI Colab notebook, simply select the Flux1_dev model.)
Refresh the ComfyUI page and select the flux model in the Load Checkpoint dropdown menu.
Step 3: Download the Flux LoRA models
Download the following LoRA models
- Extreme Detailer v0.1 – For adding details.
- Velvet’s Mythic Fantasy Styles – For adding a fantasy art style.
Put them in the folder  ComfyUI > models > loras.
(If you use my ComfyUI Colab notebook, put them in your Google Drive folder AI_PICS > models > Lora. Restart the notebook to take effect.)
Select them in the dropdown menus of the Load LoRA nodes.
Step 4: Generate an image.
Press Queue Prompt to generate an image.
Enable/Disable a LoRA
To enable or disable a LoRA model, right-click on the Load LoRA node and select Bypass.
The node will be grayed out.
Keyboard shortcut: Select the node and press Ctrl + B to enable or disable bypass.
Compare the images with and without the LoRAs:
