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This node blends the attribute opinions on the stage in the second input into the active layer of the stage in the first input.
For performance reasons, and to reduce unnecessary authoring of opinions, you will often want to branch the main stage off to a Layer Break, make the chnages you want to blend after the layer break, and then connect that branch into the second input of this node. In this setup, Houdini can tell that the stages were identical up to the layer break, and will only blend the modifications after the layer break.
This node only blends floating point attributes and transformations (including vectors, matrices, quaternions, and arrays of those data types).
String and integer data types cannot be meaningfully interpolated, so this node ignores them.
For array data, the array length on the second input is always used to generate the output, even if the blend factor is zero.
The stage to modify. All changes made by this node are made on this stage in the active layer.
The modified stage to blend onto the main stage. The node flattens (fully composes) this stage into a single layer before blending.
How much of the values from the second input to apply to the first input. For example, a value of
0 does not apply changes from the second input at all (mostly, see the tip about arrays). A value of
1 replaces values on the first input with values from the second input. A value of
0.5 would average values from the first and second inputs.