An interator contains the following nodes:
- Transforms: pre affine, pre transforms, transforms, post transforms and post affine
Transforms handle the geometrical part, while shader handles the coloring and weights (selectors) handle the selection of the next iterator.
To expand and existing iterator or one of its elements, click the + on the left of its name in the tree view (World nodes).
To add a new iterator, click the New iterator button on the Toolbar.