Export as Separate Stage
Packages the merged branch as an independent USD stage/layer.
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USD / 3DIntermediate
uMerge
USD stage assembly
Combines multiple USD stage branches into one scene and provides transform controls for positioning the merged result.
uMerge
DaVinci Resolve · Fusion
uMerge is the scene-assembly counterpart to 2D Merge and classic Merge3D, but it operates on USD stage data. It is used to combine geometry, cameras, materials, lights and imported assets into a shared stage.
Overview
What uMerge does
uMerge is the scene-assembly counterpart to 2D Merge and classic Merge3D, but it operates on USD stage data. It is used to combine geometry, cameras, materials, lights and imported assets into a shared stage.
Mental model
Think of uMerge as a scene-layer combiner: each input contributes USD data, and the transform block lets you position the assembled branch before it continues downstream.
Common uses
USD scene assembly
Combining imported assets
Camera/light/geometry stage composition
Layered USD shot construction
Flow anatomy
Inputs & outputs
The port structure shows how this node fits into a Fusion graph.
Scene / Stage Inputs
3D scene or object data to be processed or combined.
uMerge
Fusion node
Merged Stage Output
The resulting USD stage.
Inspector
Important parameters
Start with these controls before reaching for more complicated workarounds.
Translation X / Y / Z
Moves the merged stage branch.
Rotation Order
Defines rotation-axis evaluation order.
Rotation X / Y / Z
Rotates the merged branch.
Pivot X / Y / Z
Sets the transform pivot for the merged result.
Lock X/Y/Z
Links the X, Y and Z values for scale.
Scale
Sets the overall scale.
Use Target
Orients the merged branch toward a target when supported.
Practical setup
A reliable workflow
- 1
Create or load the required USD branches.
- 2
Connect them to uMerge.
- 3
Keep camera, light, geometry and material branches logically grouped.
- 4
Use the transform only for placement of the merged group, not to compensate for incorrect source assets.
- 5
Send the final stage to uRenderer or uExport.
Typical node chain
USD Branches→
uMerge→
uRenderer / uExport
Examples
Where this node fits in real work
Basic USD shot
Combine geometry, camera and material branches before rendering.
uShape + uCamera + uShaderuMergeuRenderer
Imported asset plus image plane
Merge a loaded USD asset with a plate/reference card.
uLoader + uImagePlaneuMergeuCamerauRenderer
Troubleshooting
Common mistakes
Thinking of uMerge as an image composite node.
Using one huge uMerge without logical stage organization.
Applying transforms at multiple hierarchy levels and losing track of placement.
Production notes
Practical tips
Use several clearly named uMerge nodes in large scenes.
Keep asset transforms close to the asset branch.
Treat uMerge as stage composition, not pixel compositing.
Related nodes