Higgsfield Scale Reference Workflow for Maintaining Character Size Ratios in AI Video
A Higgsfield prompt workflow guide that maintains consistent height differences between multiple characters in AI video production by creating a 'same ground li
Maintaining consistent size ratios between multiple characters in AI video production is a significant challenge. Recently, @VibeEverything shared an effective workflow within the Higgsfield environment that uses a 'same ground line front view comparison sketch'—separate from individual character sheets—to reliably lock relative character scale.
Image source: @VibeEverything on X
The core principle of this method is not relying solely on text prompts, but providing a visual guideline that forces the model to understand the physical relationship between characters.
The Core Workflow
- Visualizing Relative Scale: Instead of depending on text description for height differences, generate a 'Height comparison chart' to be used as a reference image input.
- Reference Separation: Individual 'character sheets' handle the detailed appearance of characters, while the 'comparison sketch' is solely responsible for locking the relative scale (height difference) between them.
Requirements for Comparison Sketches
When creating comparison sketches, the following criteria must be strictly observed:
- Composition: Full body FRONT view of characters standing side-by-side on the same ground line.
- Style: Rough hand-drawn line art, strictly excluding all text, dimension lines, labels, etc.
- Enforcing Proportions: Set clear physical reference points (e.g., the warrior's head reaching the giant's mid-thigh) to prevent the model from arbitrarily "correcting" the proportions.
Sketch Prompt Example
Using @giant and @Nate_arena as character references, create a hand-drawn concept sketch: a height comparison chart of the two characters standing side by side, both in full body FRONT view, on a plain white background.
Style: rough hand-drawn line art — confident sketchy contour lines in dark pencil or fine ink, loose and energetic like a film production concept sketch; line work only, no color, no painted shading, at most a few sparse hatching strokes for depth; the drawing clearly shows the height difference between the characters as a scale reference.