The Set DNA Expression node
When to use it
Bakes a modified expression mesh back into the DNA by solving what per-joint deltas would produce it. The write half of Get DNA Expression.
The pairing is strict. Edit the mesh that Get DNA Expression produced, at the same LOD, without changing its vertex count or order, or the solve has nothing to correspond against.
When you meant to change one named shape rather than a whole expression, Set DNA Blendshape.
Press Set Expression, then validate. A DNA that accepts an update can still be structurally wrong in ways only Validate DNA will name.
How to use it
- 1
Pose the expression with Get DNA Expression, then move its bones
- 2
Wire that mesh into Mesh and the same DNA into DNA
- 3
Pick the expression to overwrite and press Set Expression
The mesh must still carry the DNA's own bone names. If the skeletons do not line up, nothing is written.
Pins
| Pin | Type | Description |
|---|---|---|
DNA |
DNA | The DNA to write the expression into. |
Mesh |
Mesh | The mesh with its bones where you want the expression to sit. Start from Get DNA Expression and move joints from there. |
| Pin | Type | Description |
|---|---|---|
DNA |
DNA | The DNA with that expression re-recorded from the bones on Mesh. |
Settings
| Setting | Type | Description |
|---|---|---|
Expression Name |
Text | Which expression to overwrite. An empty dropdown means no DNA is wired into the input pin yet. |
Insert Missing Attributes |
True/False | Lets a bone you rolled record rotation on axes this expression was not already turning. It only helps joints the expression rotates somehow already; with it off, any axis that was not already in play is dropped and part of your pose quietly goes missing. |
Learn more
| Modify MetaHuman RBF poses | Read the walkthrough on meshmorpher.com | https://meshmorpher.com/blog/modify-metahuman-rbf-poses |
| Modify DNA bone expressions | Read the walkthrough on meshmorpher.com | https://meshmorpher.com/blog/modify-meta-human-dna-bone-expressions-with-mesh-morpher |
| Custom DNA topology | Read the walkthrough on meshmorpher.com | https://meshmorpher.com/blog/custom-dna-topology-with-mesh-morpher-graph |
Available in Mesh Morpher Graph and Mesh Morpher Studio.