Change the saved .duf files standard picture to the one you rendered it to.

To change the thumbnail (the preview image you see inside the Daz Studio Content Library) for a saved object in a .duf file, you don’t actually need to edit the code inside the .duf itself. Daz Studio relies on a strict file-naming convention where the image file sits right next to the scene file in the same directory.

Here is exactly how to swap it out with your own custom image.

Step 1: Prepare Your New Picture

Daz Studio expects specific dimensions and formats for its library thumbnails to keep the UI looking clean.

• Dimensions: Standard Daz thumbnails are exactly 256 x 256 pixels (a perfect square).

• Format: Save the image as a .png file.

Step 2: Locate the Files

Navigate to your custom content directory using your OS file explorer (Windows Explorer or Mac Finder).

1. Go to your preferred Daz formats folder (e.g., Documents/DAZ 3D/Studio/My Library/...).

2. Find the folder where your target .duf file is saved.

3. Notice that alongside YourObjectName.duf, there is already a matching YourObjectName.png.

Step 3: Overwrite the Thumbnail

1. Take your new 256×256 custom image.

2. Rename it to match the exact filename of your object, including capitalization.

   Example: If your file is SciFi_Chair_01.duf, your image must be named SciFi_Chair_01.tip.png. [ the image is now the one appearing as a photo when you hover over your saved item]

3. Copy and paste your new image into that folder, overwriting the old .png file.

Step 4: Refresh Daz Studio

Daz Studio caches these images, so it might not update instantly if you already have the library folder open.

• The Quick Fix: Right-click anywhere in the whitespace of that specific folder inside the Daz Studio Content Library pane and select Refresh.

Alternative: The “Lazy” In-App Method

If you don’t want to mess around in your OS file explorer, you can actually overwrite it straight from Daz Studio:

1. Set up your camera in Daz to get the perfect shot of the object.

2. Go to File > Save As > Support Asset > Figure/Prop Assets (or whatever format it originally was).

3. Select the exact same file to overwrite it.

4. In the save dialog options, Daz will ask if you want to generate a new thumbnail based on your current viewport. Hit yes, and it will auto-render and replace the image for you.