I'm experiencing an odd behavior with deformation blur in Cycles with an specific model of an elephant even in a new scene.
The weird thing here is that if I add a new object and deform it with an armature, I do have the motion blur. But that's not all: if I render without MB, the geometry is missing from the Vector Pass!!! Only the strands are visible:
The object have Motion Blur and Deformation enabled... I would like to share the file but I cannot as it is a Turbosquid model although I can share any screenshot. But normals are right, it doesn't work without the modifiers either or if I erase everything an apply an armature from the ground...
Do I missing something?