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Selecting the right assets

Élisa places assets directly on ground-level surfaces, so be sure that each asset has its pivot point accurately positioned at the base. Supported asset types:
  • ✅ Meshes
  • ✅ Prefabs (Unity)
  • ✅ Blueprints (Unreal)
  • ✅ Models in your Toolbox (Roblox)
Important considerations:
  • Assets with invalid thumbnails or null bounding box dimensions will be skipped.
  • Blueprints dependent on external runtime data may not compute usable dimensions.
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  • 🛑 In Unreal Engine if you’re using Nanite, it’s recommended to temporarily disable it on your meshes before generating the catalog.
    When Nanite is enabled, assets may appear unlit or material-less in the extracted thumbnails.
    You can safely re-enable Nanite after the catalog generation is complete.
  • ⚠️ In Roblox the catalog is made dynamically with your Inventory in you Toolbox!

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Generating a Catalog

Once your assets are selected in the Content Browser, generate the catalog:

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Option 1:

  1. Open Edit > Project Settings > Plugins > Elisa > Descriptions tab
  2. Click **Generate Catalog **or **replace catalog **(if already catalog exist) button.
  3. Élisa scan the entire project files assets and diplays the number of assets contained in a window.
  4. Press Generate button
Download

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Option 2:

  1. Right-click the selection and choose Add to Catalog.
  2. Élisa scan the folder or selected assets and diplays the number of assets contained in a window.
  3. Press Generate button Download
On Roblox, the catalog is generated by Élisa itself. All assets in your toolbox will be added to your catalog and be ready to be used by you and Élisa.
Let an LLM do the writing for you!
Paste your asset pack URL into your favorite chat interface and use this prompt:
“Analyze every item in the catalog and write 3-5 sentences (60-120 words) that capture their shared stylistic and technical DNA. Cover dominant art styles/eras, modelling techniques, color palette and lighting mood, and any typical functional contexts. Omitting all file paths, IDs, prices, or seller names.”
  1. The system will display a progress bar while it:
    • Analyze bounding boxes, compute asset sizes, and generates thumbnails.
    • Exports the catalog as a CSV file.
  2. Once generation completes:
    • Élisa shows a Generation completed notification in the progress bar.
    • The catalog is automatically uploaded and set as active - no manual upload needed!
    • Élisa is instantly ready to use the new catalog!
You can download the currently active catalog at any time from the ⚙️ Élisa Settings panel:
Same for Unity, in this section of the ⚙️ Élisa Settings panel:Screenshot 2025-10-14 at 10.42.10 AM.png
Roblox catalogs are dynamically made from your Inventory

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Uploading your Catalog CSV manually

If you’ve built your own catalog .csv, you can upload it from the ⚙️ Élisa Settings: Simply click Upload to select and load your .csv file:
Once uploaded, the new catalog becomes immediately active. You’ll see its name displayed and can edit its description anytime.

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Updating an Existing Catalog (Append or Replace)

Élisa supports appending new assets to your current catalog or replacing it entirely from the Generate Catalog window.
  1. Select the assets you want to add and Right-click the selection and choose Add to Catalog.
  2. In the Update Existing Catalog section, choose one of the following:
    • Append to catalog: Adds the selected assets to your current catalog.
    • Generate a new catalog (replace existing entries): Rebuilds the catalog using only the selected assets.
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  3. Click Append or Replace Catalog button to start the process.
Replacing a catalog overwrites the existing entries. Use Append if you want to keep your current assets.

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Creating your own Catalog CSV from scratch

If you’d like to define a custom asset catalog manually, you can construct your own catalog.csv file. Élisa supports this advanced workflow by reading structured .csv files with detailed asset metadata. Your catalog.csv should use the following format:
indexdescriptionpathx_sizey_sizez_sizerotation_for_facing_forward
0A quaint cottage featuring a chimney…/Game/Assets/SM_Building_1790.85864.28989.85-90
1A house with a blue roof and porch…/Game/Assets/SM_Building_2968.241345.691517.63180

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Required columns

  • index: A unique row identifier.
  • description: A short text describing the asset.
  • path: The full package asset path from your Unreal project.
  • x_size / y_size / z_size: Bounding box dimensions in centimeters.
  • rotation_for_facing_forward: The rotation in degrees Élisa applies to align the asset’s front side with the +X axis.
Important Notes:
  • All dimensions must be in the Engine units (cm, m, etc…).
  • Descriptions help Élisa provide context or selection feedback during placement.
  • Ensure no header row is missing or misnamed - column names must match exactly.