Shapes and rasterization
When a group becomes rasterized, all masks, shapes, and paint strokes in that group are affected and may no longer interact with other layers and groups as expected. Because paint strokes are rendered in a plane, they are always rasterized (independent of other objects in the same group). This affects how the dabs that comprise a paint stroke interact with objects in the same group.
Note: Because a paint stroke is always rasterized, no rasterization indicator appears around the paint stroke icon.
For more information on rasterization with 2D and 3D groups, see Groups and rasterization.