Another img for parameter comparison. spp = 64, num_shadow_ray_sample = 64

[Final] Fixed all the bugs. spp = 64, num shadow_ray_sample = 4

[Additional bug] Also fixed the normal that caused internally lit up teapot

[Fixing previous bugs] I realized I had forgotten to add environment sampling for reflections in the previous project 🤦‍♀️

[Step 1] Soft shadow complete

Step[-1]: While setting up the project, found out there was a bug in sample disk in p9. Will be back making sure all the bugs are fixed.