Wire a Material Texture

Recommended sequence:

1. material_graph_inspect to find the current material graph.
2. material_palette to find the expression node to add.
3. schema_inspect for material_graph_edit operation addFromPalette.
4. material_graph_edit to add the expression.
5. schema_inspect for the connect operation.
6. material_graph_edit to connect explicit pins.
7. material_graph_layout for the touched node selection.
8. material_compile.

Use material_node_inspect and material_node_edit only when changing expression properties.