Edit README

README.md

@@ -28,7 +28,7 @@ You may use any tools of your preference such as `conda`. Our codes should repro
 
 ## Progress
 
-- [ ] Implement the base model and volume rendering pipeline proposed in [NeRF: Representing Scenes as Neural Radiance Fields for View Synthesis (ECCV 2020)](https://www.matthewtancik.com/nerf).
+- [x] Implement the base model and volume rendering pipeline proposed in [NeRF: Representing Scenes as Neural Radiance Fields for View Synthesis (ECCV 2020)](https://www.matthewtancik.com/nerf).
 - [ ] Extend the implementation to [Mip-NeRF: A Multiscale Representation for Anti-Aliasing Neural Radiance Fields (ICCV 2021)](https://arxiv.org/abs/2103.13415).
 - [ ] Extend the implementation to [Mip-NeRF 360: Unbounded Anti-Aliased Neural Radiance Fields (CVPR 2022)](https://jonbarron.info/mipnerf360/).
 - [ ] Extend the implementation to [NeRF in the Dark: High Dynamic Range View Synthesis from Noisy Raw Images (CVPR 2022)](https://bmild.github.io/rawnerf/).