The Cluster Shape Combiner property is created automatically when you first store a shape key source.
To display: Select an object with shape animation then choose on the Select panel and click the node.
The Cluster Shape Combiner includes a Weight and a Overlap Weight parameter for each cluster that is driven by shape key clips.
For more information, see Mixing between Clusters [ Shape Animation ].
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Controls how the Weight values are combined. When this option is off, shapes are combined additively. When this value is on,
the weights are normalized, resulting in a shape that is in between the sources of the clips that affect the object at the
current frame. This option has no effect on the Overlap Weight parameters.
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Normalizes the slider values.
For example, consider that there are shapes on two overlapping clusters, and both sliders are at 1. If you turn on this option, then the points in the overlapping area contain both shapes applied additively.
If you turn off this option, then the weights in the overlapping area get normalized (.5 for each cluster in this case) and
the result in the overlapping area is halfway between the two shapes.
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Controls how strongly the corresponding cluster is pulled by its shape sources. A value of 1 corresponds to the source shape.
Lower values correspond to a shape between the reference and the source, while higher values correspond to an exaggeration
of the source.
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Controls how strongly the corresponding cluster affects components that are shared with other animated clusters. These values
are always normalized.
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