NeRF: Representing Scenes as Neural Radiance Fields for View Synthesis

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Hi, I am studying NeRF(https://www.matthewtancik.com/nerf) to know how it works. I found a PyTorch implementation on Google Colab on a Github page, but I encountered an error(RuntimeError: mat1 dim 1 must match mat2 dim 0) at line 113 in the last cell(below Run training / validation cell). It seems like the source code is missing two arguments in nerf_forward_pass() function, the nerf_forward_pass() function has 19 arguments and it inputs only 17, but I still got the same error after adding the two missing arguments.

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