tutorial for writing custom pytorch cpp+cuda kernel, applied on volume rendering (NeRF)
tutorial playlist: https://www.youtube.com/watch?v=l_Rpk6CRJYI&list=PLDV2CyUo4q-LKuiNltBqCKdO9GH4SS_ec&ab_channel=AI%E8%91%B5
CUDA explanation in video 2: https://nyu-cds.github.io/python-gpu/02-cuda/
C++ API in video 3: https://pytorch.org/cppdocs/
kernel launching: https://pytorch.org/tutorials/advanced/cpp_extension.html