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The attributes may be explicitly specified in the corresponding attribute text field. Exclusion is specified by preceding an attribute name with the caret character (^). All available attributes can be specified by leaving the field blank or entering an asterisk (*) in the field. If the first attribute is preceded by a caret then all attributes are assumed to be transferred except where explicitly excluded. In all other cases, no attributes are assumed except where explicitly included.
The specified attributes of the ordered inputs are composited in sequence. The attributes are first scaled by the corresponding blending weights and then composited using the specified compositing operator. The available operators include Mean, Max, Min, Over, and Under. The Mean operator determines the weighted average of the input attributes. The Max and Min operators determine the maximum and the minimum of the weighted input attributes respectively. For the Mean, Max, and Min operators, the specified Alpha Attribute affords a per-point, per-primitive, or per-vertex weight distribution. The Over and Under operators perform two of the standard alpha blending operations where the alpha values are taken from the specified Alpha Attribute. The Over operator scales the incoming weighted input attribute by its alpha value and adds it to the current intermediate output attribute scaled by one minus that alpha value:
source * alpha + destination * (1 - alpha)
The Under operator is performed in a similar manner but with the alpha weights swapped:
source * (1 - alpha) + destination * alpha
If the Alpha Attribute does not exist for a particular input, then the alpha mask for that input is assumed to be 1.
Specifies which input to use when generating the cooked selection.
Detail attributes to composite.
Primitive attributes to composite.
Point attributes to composite.
Vertex attributes to composite.
Match P Attribute
If enabled, patterns used in the Points parameter can match the
Controls contribution of geometry inputs.
Attribute containing the alpha mask.
Operator to composite with.
This example demonstrates how to blend attributes using the Attribute Composite SOP.
The following examples include this node.