What is the proper K, R and t for neural_renderer?

[JaneLinlalala]

I got a mistake that K, R and t is None in renderer of neural_renderer.
It says "'NoneType' object has no attribute 'transpose' " at
vertices = torch.matmul(vertices, R.transpose(2,1)) + t
and vertices = torch.matmul(vertices, K.transpose(1,2)).
I set the K, R and t of neural_renderer to 0, it works, but the iou_loss didn't change. It was always 1.0.
What is the proper K, R and t for neural_renderer?