Upscale Tutorial

Increase image resolution and quality.

Why Upscale

• Higher resolution for print
• Better quality for large displays
• Enhance old/low-quality images
• Prepare for specific use cases

Upscaling Methods

Method 1: AI Upscale (Recommended)

Uses AI models for better quality.

Nodes needed:
- UltimateSDUpscale
- OR 4xUltraSharp

Workflow

[LoadImage] → [UltimateSDUpscale] → [SaveImage]
              ↑
[Model (upscale model)]

Parameters

Parameter	Value	Description
Scale	2x, 4x	Upscale factor
Tile Size	512, 768	Processing size
Tile Padding	64	Overlap for blending

Method 2: Basic Upscale

Simple resize without enhancement.

Node: ImageScale
- mode: lanczos / bilinear
- scale: 2

Method 3: Latent Upscale

Upscale in latent space, then decode.

[EmptyLatent (upscaled)] → [VAEDecode] → [SaveImage]

Upscale Models

Model	Use	Quality
4x-UltraSharp	Photos	Excellent
4x-NickelSSR	Anime	Good
RealESRGAN	General	Good
SwinIR	Photos	Excellent

Step-by-Step: Ultimate SD Upscale

Step 1: Load Image

LoadImage node
- Upload your image

Step 2: Add Upscale Node

UltimateSDUpscale
- Load upscale model
- Set scale factor (2x recommended)
- Set tile size (512 or 768)

Step 3: Configure

Setting	Value
Scale	2
Tile Size	512
Tile Padding	64
Seam Fix	Enabled
Seam Resolution	64

Step 4: Generate

Click "Queue Prompt"

Tips for Better Results

Resolution Limits

Original	Target	Recommended
512x512	1024x1024	2x upscale
512x512	2048x2048	4x (2x twice)
768x768	1536x1536	2x

Memory Management

• Use smaller tiles if VRAM limited
• Process in sections for large images
• Use fp16 models to save memory

Quality Improvement

1. Use dedicated upscale models
2. Apply at 2x first, then again if needed
3. Combine with denoising for enhancement

Common Issues

Issue	Solution
Out of memory	Reduce tile size
Artifacts	Enable seam fix
Too soft	Add slight denoise
Not sharp enough	Use sharper upscale model

Next Steps

• Embedding - Improve quality with embeddings
• LoRA - Apply styles
• Model Merging - Combine models