Prompt Prefix + Suffix is a powerful feature that helps reinforce consistency across your generations - especially when working with styles like single characters or game items that share a specific format, perspective, or visual identity.
This guide walks you through how to set up and use prefixes and suffixes effectively.
Why Use Prefix + Suffix?
When your training data already follows a consistent structure - like image captions formatted with a character description or a repeated perspective (e.g. “isometric view of a game item”) - you can take advantage of that structure during generation.
Prefixes and suffixes help lock in two key things:
Prefix: Describes the consistent, unchanging parts of your asset (e.g. a character’s physical appearance)
Suffix: Reinforces the consistent art style (e.g. lighting, rendering style, color palette)
They don’t replace your input prompt - they wrap around it, so your custom prompt is always framed with important context.
Example: Single Character (Fred)
Let’s take the character “Fred” as an example. All your training images of Fred follow a consistent caption format. That means you can pull sections of that caption into the prefix and suffix fields.
Prompt Prefix Example:
Fred is a stout man with fair skin, a round face, and neatly combed reddish-brown hair. He wears distinctive pink glasses, framing his friendly, green eyes.
This is Fred’s physical description. It doesn’t change. No matter what pose, outfit, or action you’re generating - you want him to always look like Fred. Adding this as a prefix ensures that identity is locked in.
Prompt Suffix Example:
The art style is 3D animated, with smooth, plasticky surfaces, bright and saturated colors, and soft lighting. The overall aesthetic is cartoonish and friendly, with exaggerated proportions and expressive features.
This is your art style description. While the style training already bakes in a lot of style consistency, adding this suffix reinforces the output direction - especially when your prompt starts introducing variations (e.g. “Fred riding a bicycle” or “Fred in a space suit”).
When to Use Prefix + Suffix
This feature works best when your captions and prompts follow a structured format. Here are common use cases:
Single Character: Reuse the character’s physical description as a prefix, and their art style description as a suffix.
Game Items (e.g. isometric): Use a prefix like “An isometric view of…” to keep asset perspective locked in.
Icons and Symbols: Use a suffix like “icon in a flat UI style with bold colors and thick outlines.”
If every caption in your training set includes repeated phrasing or structure, it’s probably a good candidate for prefix/suffix.
How to Set It Up
Setting up the prompt prefix and suffix is quick:
Go to the Style Settings page for your trained style
Scroll down to the Prompt Prefix and Prompt Suffix input fields
Paste in your formatted prefix and suffix text
Save the style settings
Now, anytime you forge with this style, the prefix and suffix will automatically be added to every prompt you write. For example:
Your input prompt:
Fred, wearing a Halloween costume, happy expression, jumping
Actual prompt used behind the scenes:
Fred is a stout man with fair skin, a round face, and neatly combed reddish-brown hair. He wears distinctive pink glasses, framing his friendly, green eyes. Fred, wearing a Halloween costume, happy expression, jumping. The art style is 3D animated, with smooth, plasticky surfaces, bright and saturated colors, and soft lighting. The overall aesthetic is cartoonish and friendly, with exaggerated proportions and expressive features.
This keeps your results on-model - helping the AI stay true to your character and style even as you create new content and explore different prompts.
Final Notes
Prefix/suffix are optional but recommended for characters or object styles
Don’t overdo it - short focused descriptions work better than complex ones
Review your outputs and adjust prefix/suffix wording if things start to drift