4. CEL and Assigning Materials

In the video:

• The next stage is to apply the materials.

• Use the GroupStack node to group the materialAssign nodes to simplify the node graph.

• Use CEL to assign the default material to the geo folder in the scene.

• Add a new materialAssign node with a CEL statement that associates part of the scene graph with the material. You can drag from the scene graph to the Add Statements item in the CEL statement parameters.

• You can also use a custom CEL expression to bind materials.

• Use //* to apply the material to everything downstream of a point in the scene graph. Also, add strings to target scene graph contents by name.

• You can use face selection and a FaceSetCreate node to target specific geometry.

• Multiple CEL statements can be combined using the set operators: union, difference, and intersect.

• CEL's rule based approach gives you a more robust method for material assignments.