How to Add an Outline to any alpha media in Da Vinci Resolve Fusion| Sabbirz | 3d Learning Blog
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How to Add an Outline to any alpha media in Da Vinci Resolve Fusion

How to Add a Quick Outline in DaVinci Resolve Fusion

Create Easy Outlines in DaVinci Resolve Fusion

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Need to add a crisp outline to a logo or graphic in DaVinci Resolve Fusion? You might think of complex multi-node setups, but there's a surprisingly fast way to get it done using a tool you might not expect: the Delta Keyer.

While it's famous for pulling greenscreens, the DeltaKeyer has powerful Matte controls that are perfect for creating procedural outlines. This tutorial will show you how to add an outline to any image that already has an alpha channel (like a PNG logo).

Let's get started 💡

Step 1: Add Your Media and the Delta Keyer

First, bring your image or video with an alpha channel into your Fusion composition. This will create a MediaIn node.

For this demonstration i am using an alpha image. Add a background node and merge the media and background.

Note: Press Ctrl + T to swap the top and bottom layer while the Merge node/ tool is selected.

Step 2: Remove the background

Next, add a DeltaKeyer node. With your MediaIn node selected, press Shift + Space and search for "Delta Keyer," or find it in your toolbar. Connect your MediaIn node to the input of the DeltaKeyer.

Remove background with Delta Keyer

Select the deltaKeyer node/ tool & Inside the Key tab select the background color to remove the background

Step 3: Create the Outline with Matte Controls

This is where the magic happens ✨ Select your DeltaKeyer node to open it in the Inspector panel.

Add outline with delta Keyer

  1. Click on the Matte tab.
  2. Find the Erode/Dilate slider. This control shrinks or grows the matte (your alpha channel).
  3. Increase the value slightly (e.g., to 0.005 or 0.01). You won't see a change yet, but this is "growing" your alpha channel behind your original image.
  4. Now, find the Replace Mode dropdown. By default, it's set to None.
  5. Change this to Hard Color.
  6. As soon as you do, your new, larger "outline" area will be filled with a default color (usually black).
  7. Use the Replace Color swatch right below it to pick the exact color you want for your outline. 🎨