GroupTransform = 2

This option is similar to UsageHints.DynamicTransform in that it allows GPU transformation of the vertices of the descendants. However it breaks the batch, and adds an extra draw call. The purpose of this hint is to avoid having to update the stored matrix of many elements that have UsageHints.DynamicTransform set when a common ancestor changes its transformation or position. In other words, this is an optimisation for UsageHints.DynamicTransform.

An example use case is that in Shader Graph, you can set individual nodes with UsageHints.DynamicTransform, and set the ancestor panner/zoomer with , so that when you pan/zoom, you avoid the need to update hundreds of dynamic transforms.

Note: Don't use both UsageHints.DynamicTransform and GroupTransform at the same time on a single VisualElement.