Outpainting Tutorial

Extend image beyond original boundaries.

What is Outpainting

Outpainting generates new content extending beyond the original image edges.

Use Cases

• Create wider compositions
• Add more background
• Change aspect ratio
• Expand scene elements

Basic Workflow

Step 1: Load Image

Node: LoadImage
- Upload your base image

Step 2: Create Expansion Mask

1. Extend canvas to desired size
2. Paint mask on new areas (white = generate)
3. Original image areas stay black (preserve)

Step 3: Connect Nodes

[LoadImage] → [VAEEncode] → [KSampler] → [VAEDecode] → [ImagePad]
                                                   ↑
                                        [LoadImage (cropped)]

Step 4: Parameters

Parameter	Value	Description
Denoise	0.6-0.8	Balance original vs new
Steps	25-35	Quality
CFG	7-9	Standard

Different Methods

Method 1: Simple Expansion

1. Extend image in external editor
2. Load into ComfyUI
3. Use PaintHlight node for new areas

Method 2: Crop and Expand

1. Load full image
2. Crop to region needing expansion
3. Generate new content
4. Composite back together

Method 3: Pan and Zoom

Use nodes like:

ImagePanAndZoom
- Set start/end positions
- Generate intermediate frames
- Create expanded composition

Aspect Ratio Changes

16:9 to 9:16 (Portrait)

1. Extend canvas height
2. Add top/bottom content
3. Keep center same

Square to Wide

1. Extend canvas width
2. Add left/right content
3. Maintain subject position

Tips

Smooth Transitions

• Use feather on mask edges
• Blend generated content with original
• Check lighting consistency

Style Consistency

• Match original image style
• Use similar prompts
• Check color palette

Resolution

• Work at same resolution as original
• Upscale after if needed

Common Issues

Issue	Solution
Disconnected content	Use higher denoise
Style mismatch	Match prompt style
Visible seams	Use edge blending

Next Steps

• Upscale - Increase resolution
• Inpainting - Fix specific areas
• SDXL Workflow - Use SDXL model