How to obtain 2d 68 landmark of rendered image from 3d shape using Pytorch 3D?

I am working on Basel Face Model with pytorch 3D. I can render face but I need 2d landmarks of rendered image. For example, I know 3d coordinates of 68 landmarks. I want to draw these points on 2d rendered image. How can I do this ?

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I think this tutorials
That can help you.

I found the answer of this question. We need use transform_points and transform_points_screen functions of CamerasBase object.