Overview
The Enhanced Image Assignment Tool in 3Dsellers streamlines the process of uploading and systematically assigning images to your products and listings. It offers multiple assignment methods to match your workflow, whether you want fully automatic matching or manual control. The tool supports bulk uploads, matches images to product SKUs, and helps preserve the correct image sequence for better product presentation.
Benefits of the Enhanced Image Assignment Tool
Using this tool provides several advantages:
Bulk Upload: Upload hundreds or thousands of images at once.
Automatic Assignment: Match images to products based on SKU patterns.
Flexible Methods: Choose the best assignment method for your folder/file structure.
Image Sequence Preservation: Maintain the correct order of images (main image, secondary images, etc.).
Time Savings: Reduce the need for manual uploading and assigning.
Consistency: Keep images correctly attached to the right SKUs every time.
Catalog Integration: Images upload to the Product Catalog first and can then be synced to listings across channels.
Accessing the Enhanced Image Assignment Tool
To access the tool:
Log in to your 3Dsellers account.
In the left sidebar, go to Listings & Products (or Marketing).
Click Image Hosting.
Click + Upload Image or + Upload Folder in the action bar.
The bulk upload window will open.
Note: Each eBay listing can have up to 24 images.
Understanding Image Assignment Methods
This tool includes the following methods:
Don't Assign
Assign By Fix SKU
Assign By Image Name
Assign By Folder Name
Advanced Mapping Assign
Each method supports a different workflow, depending on how your images are organized.
Image File Requirements
Before uploading, make sure your images meet these requirements:
Supported formats: JPG, PNG (and other common formats)
Max file size: 12MB per image
Max dimensions: 1500 x 1500 pixels
Upload types supported: Single files, multiple files, ZIP files, or folders
eBay limit: Up to 24 images per listing
Tip: Compress large images before uploading for faster processing.
Method 1: Don't Assign
This option uploads images to your Image Hosting library without attaching them to products automatically.
When to Use
You want to upload images first and assign them later
Your images don’t follow any SKU naming pattern
You want full manual control
How to Use
Select Don't Assign
Upload your images (drag & drop or browse)
Complete the upload
After Uploading
Images appear in your Image Hosting library without an SKU assigned
You can manually assign an SKU to them later
You can also reference them in imports using their URLs or filenames
Method 2: Assign By Fix SKU
This option assigns all uploaded images to one specific SKU.
When to Use
You are uploading multiple images for one product
Your image names do not contain the SKU
You want to quickly attach images to a known SKU
How to Use
Select Assign By Fix SKU
Enter the SKU in the field provided
Upload your images
All uploaded images will attach to that SKU
Important Notes
All images in that upload session go to the same SKU
Image order usually follows the upload order
Method 3: Assign By Image Name
This option automatically assigns images based on SKU patterns found in the image file names.
When to Use
Your images filenames include your listing's SKU (example:
PROD-001-main.jpg)You have consistent naming across products
You want automatic assignment without custom mapping rules
How It Works
The system reads filenames
Extracts a SKU value
Matches it to your Listing's SKU
Assigns the image to the correct product
File Naming Best Practices
Include the SKU clearly in the file name
Use separators like hyphens or underscores
Add numbers for sequence/order (example:
SKU-123-1.jpg,SKU-123-2.jpg)
Method 4: Assign By Folder Name
This option assigns images based on SKU patterns found in folder names.
When to Use
Your images are organized into folders named by SKU
Each folder contains only one product’s images
You want to upload full folders in bulk
How It Works
The system reads the folder name
Matches the folder name to a SKU
Assigns all images in that folder to the matching product
Best Practices
Use one folder per SKU
Make sure folder names match SKUs exactly
Name images inside folders in the order you want displayed
Method 5: Advanced Mapping Assign
This option is the most flexible method and allows custom matching using patterns.
When to Use
Your naming convention is not standard
You want full control over which file becomes the main image and which become secondary
You have complex naming styles (main/side/detail)
How It Works
You create rules using
{SKU}as a placeholderThe system matches uploaded image names to your rules
When a match is found, it assigns the image to the correct SKU and image position
Example Patterns
If your images are named like:
PROD-001-1.jpgPROD-001-2.jpg
You can map:
Primary image:
{SKU}-1Image 1:
{SKU}-2
Important: The match must be exact, including hyphens, underscores, and capitalization.
Auto Assign Images to Drafts (After Upload)
After uploading your images (or folders) into Image Hosting using the assignment method you selected, you still need to apply those images to your drafts.
To do this:
Go to Listings & Products → 3Dsellers Drafts
Select the draft listings you want to update
Click Bulk Actions → Product Photos & Video → Auto image assign
This will automatically attach the uploaded images to the selected drafts based on the SKU matching rules.
Choosing the Right Assignment Method (Quick Decision Guide)
Use Don't Assign if:
You want to upload first and assign later
Your files don’t have SKU patterns
Use Assign By Fix SKU if:
One upload batch = one product SKU
Use Assign By Image Name if:
SKUs appear inside your image filenames
Use Assign By Folder Name if:
You use folders named by SKU
Use Advanced Mapping Assign if:
You need custom rules for main/secondary image order
Best Practices for Reliable Image Assignment
File Naming Tips
Keep naming consistent
Always include the SKU when using automatic methods
Use separators like
_or-Add numbers or keywords to control image order
Avoid special characters that may cause problems
Workflow Tips
Start with a small test batch (5–10 images)
Confirm the images went to the correct SKUs
Then upload larger batches
Troubleshooting
Images Not Assigning?
Check:
Filename/folder matches SKU exactly
You selected the correct assignment method
Your naming pattern is consistent
Images Assigned to the Wrong SKU?
Check:
Typos in SKUs
Similar SKUs causing confusion
Advanced Mapping rules that match incorrectly
Upload Errors?
Check:
File size under 12MB
Image dimensions under 1500x1500
Supported format (JPG/PNG)
Avoid very long filenames or special characters
Try a smaller batch
Important Notes and Limitations
Automatic assignment requires SKUs to exist in your Product Catalog
Advanced Mapping requires exact file name matches
eBay supports up to 24 images per listing
SKU matching may be case-sensitive