AI CC V 26.1 160 Shadows are still clipping (3D and Materials)
Shadows are still being clipped in this new version when extruding a simple square object or other objects. Revolved objects, too. The object is well within the artboard boundary, yet there is what appears to be a square mask (hard edge) around the perimeter of the soft shadow, at any render setting.
The image's gray area is the canvas, so you can see the artboard's boundary is not clipping the shadow.