Use this guide when your generated product looks wrong in size, shape, proportions, or structure.
Product size and shape can be difficult for AI image models because a single image does not always explain how large a product is, how deep it is, or how it should sit in a real scene. Riverflow will perform best when you give it clean product imagery and clear scale references.
If the product is completely wrong
If the product has generated with the wrong shape, dimensions, or artwork, use one of these options.
Regenerate from scratch
Use this if you are happy to create a new image and do not need to preserve the exact scene. Select the Remix button to re-load your original prompt, and add some extra support for the model to help it generate your product more faithfully.
You can add a prompt like:
You MUST keep the product visually faithful to the reference image. Do not change the product shape, proportions, color, label placement, cap, closure, material, logo, or visible text.
Swap the product into the image
Use this if you like the scene, but the product itself is wrong.
You can use Swap Product, or use Edit with a prompt like:
Swap the product in this image for the product in my reference image.
Keep the scene, camera angle, lighting, and composition the same.
The replacement product must stay faithful to the reference image, including shape, proportions, label placement, colors, material finish, cap or closure, logo, and visible text.
If the product is close but the proportions are wrong
If the image is otherwise good, but the product is slightly too tall, short, wide, narrow, or misshapen, regenerating is often better than trying to stretch the product with editing.
Precise product proportion edits are difficult for AI because changing product size can also affect shadows, reflections, perspective, and nearby objects.
For the best results, create a product reference sheet and use it as a specification reference in future generations.
Create a product reference sheet
A product reference sheet is a 3x3 image grid that shows the product from multiple angles, with close-ups and scale references. It helps Riverflow understand the product more accurately.
Before creating one, gather:
a clear front product image
side or angle views if available
close-ups of labels, caps, closures, materials, or important details
a hand-held or in-use image if scale matters
approximate product dimensions in millimeters, if available
If you do not know the dimensions, write dimensions not provided. Do not invent measurements.
Use this prompt in the Images section, with your product references attached:
Create a clean 3x3 product reference sheet for [PRODUCT NAME].
Purpose:
This sheet will be used as a future AI generation reference. It must preserve the product's identity, shape, scale, proportions, label placement, colors, material finish, and visible text.
Reference priority:
- Use the main product image as the source of truth for product shape, color, proportions, label placement, and materials.
- Use the clearest label or artwork reference as the source of truth for readable text.
- Use hand-held, in-use, ruler, or dimension references only for scale and handling cues.
- Do not copy styling, scenery, props, or unrelated products from lifestyle references.
Physical dimensions:
- Height: [HEIGHT] mm
- Width: [WIDTH] mm
- Depth or diameter: [DEPTH/DIAMETER] mm or unknown
If dimensions are unknown, include a scale panel labeled "dimensions not provided" and do not invent measurements.
Approved visible text:
Only render these readable text strings:
"[TEXT LINE 1]"
"[TEXT LINE 2]"
"[TEXT LINE 3]"
If small text is not readable in the source reference, render it only as subtle microtext marks. Do not invent legal copy, ingredients, nutrition facts, barcodes, claims, icons, or certification marks.
Sheet format:
Create a clean 3x3 grid on a neutral light grey background with thin dividers. Each panel should show one useful reference view. Do not create a lifestyle ad, collage, or campaign image.
Panel 1: Full front view of the product, straight-on.
Panel 2: Left three-quarter or side view, only if supported by the references.
Panel 3: Right three-quarter or side view, only if supported by the references.
Panel 4: Top, cap, closure, opening, seal, or structural close-up.
Panel 5: Main brand, logo, and text-zone close-up.
Panel 6: Lower label, material, texture, or artwork-detail close-up.
Panel 7: Measurement panel with a ruler or dimension brackets. Product and ruler must be in the same plane. Label dimensions as approximate if needed.
Panel 8: Hand-held or scale comparison panel, if a scale reference is provided. If no scale reference is provided, use a clean full-product scale panel labeled "dimensions not provided".
Panel 9: Open, use, pour, worn, or action panel only if supported by the references. If not supported, use another clean product angle.
Keep consistent:
- product silhouette and proportions
- packaging structure
- cap, closure, seams, folds, or edges
- colors and materials
- label placement
- readable approved text only
- realistic scale
Avoid:
- changing the product design
- inventing unseen back panels
- adding unsupported labels or claims
- adding props or scenery
- adding extra products
- rendering the grid as a final ad image
- changing flavor, SKU, colorway, or packaging type
Example of a product reference sheet
Use the reference sheet in Riverflow
Once you have generated the reference sheet:
Save the best sheet.
Upload it as a reference in Riverflow.
Use it as a product specification or size reference when generating in Photoshoots.
Add guidance like this:
Use this as a product specification reference only. Preserve the product's proportions, scale, readable label text, colors, material finish, cap or closure details, and handling cues shown in the sheet.
Do not render the reference sheet itself, the grid layout, ruler, measurement labels, annotations, or multiple product views in the final image. Use the selected product image as the hero product source of truth.
