Step-by-Step Guide Series:
HiDream - IMG to IMG Workflow

This article accompanies this workflow: link

This guide is intended to be as simple as possible, and certain terms will be simplified.

Workflow description :

The aim of this workflow is to generate images from text in a simple window.

Prerequisites :

📂Files :

24 gb Vram : base
16 gb Vram: Q8_0
12 gb Vram: Q5_K_S
<12 gb Vram: Q4_K_S

For base version
Model : hidream_i1_dev_fp8.safetensors
in ComfyUI\models\diffusion_models

For GGUF version
GGUF_Model : hidream-i1-dev-QX_K_S.gguf
in ComfyUI\models\unet

VAE : ae.safetensors
in ComfyUI\models\vae

CLIP : clip_l_hidream.safetensors, clip_g_hidream.safetensors, t5xxl_fp8_e4m3fn_scaled.safetensors and llama_3.1_8b_instruct_fp8_scaled.safetensors
in ComfyUI\models\clip

📦Custom Nodes :

Don't forget to close the workflow and open it again once the nodes have been installed.

Usage :

In this new version of the workflow everything is organized by color:

Green is what you want to create, also called prompt,
Red is what you dont want,
Yellow is all the parameters to adjust,
Pale-blue are feature activation nodes,
Blue are the model files used by the workflow,
Purple is for LoRA.

We will now see how to use each node:

Write what you want in the Positive node :

Write what you dont want in the Negative node :

Select image format :

Choose the guidance level :

I recommend starting at 1 for HiDream.. The lower the number, the freer you leave the model. The higher the number, the more the image will resemble what you “strictly” asked for.

Choose a scheduler and number of steps :

I recommend ddim_uniform and between 20 and 30. The higher the number, the better the quality, but the longer it takes to get an image.

The denoise parameter allows you to choose the level of influence your base image has on the new one.
To put it simply, 1 will give you a completely new image; 0 will give you exactly the same image as the original. I recommend starting around 0.8 and adjusting accordingly.

Choose a sampler :