Text to Image Workflow

1. Understanding the Text to Image Workflow

start by clicking on ComfyUI, create a new ComfyUI workflow

add the basic workflow for Text to Image

The workflow in ComfyUI is similar to that in Web UI:

select a model → enter prompt → set parameters → generate image

Parameters

control_after_generate: control over seed generation

fixed: fixing the seed

increment: adding 1 from the existing seed

decrement: subtracting 1 from the existing seed

randomize: random seed

scheduler: usually choose between normal or karras denoise: which indicates the strength of noise reduction in image generation, the higher the value, the greater the impact and change on the image

size recommendation:

SD1.5: 512512

SDXL: 10241024

2. How to add a node?

Add KSampler

First, add a core node: the KSampler

• Right-click: Add Node → sampling → KSampler

Pull out the node

then pull out the sampler node and add the corresponding nodes

model→CheckpointLoaderSimple

positive→CLIPTextEncode

negative→CLIPTextEncode

latent_image→EmptyLatentImage

LATENT→VAEDecode

IMAGE→SaveImage

How to add LoRA?

Loaders: mainly used for loading the diffusion model, including model and LoRA.

Add Node→loaders→Load LoRA

How to add Clip Skip?

Conditioning: guides the diffusion model to generate specific outputs, including Prompt, ControINet, Clip Skip, etc.

It is recommended to add Clip Skip to control the layers skipped, which helps adjust the final image details.

Add Node→conditioning→CLIP Set Last Layer

Connect nodes

After adding nodes, many nodes might not be connected yet. They need to be connected in order according to the sequence and matching colors.

Checkpoint→LoRA→Clip Skip→Prompt→KSampler、Empty Latent Image→VAE Decode→Save Image

3. Starting the Text to Image

Choose a Checkpoint

Select LoRA and adjust the weights

Set Clip Skip, typically choosing to set it to -2

Enter prompt

Set relevant parameters

Since the SDXL model is chosen here, set the sampling steps to around 40, and image size to 1024*1024

Click Generate

View the results