Wow that detail  sheesh. Amazing detail and i must agree with the others about sticking strictly to Shi No Numa. maybe you should implement the features synonymous with the map (zipline, jungle environmen...etc) and implement a more diverse arsenal from various games. It can also be similar ...

Doesn't matter if I place the caulk_shadow brushes above or below the info_null, it just looks the same or worse.

Maybe try making one side caulk_shadow and the rest normal caulk? just puttin...

What do you mean vertical shadows? Can you please post a screenshot so that maybe we can see the problem?

Don't know if it'll work but maybe try making a brush on the grate textured with chalk_shadow. It should  work like normal caulk but block light.

Great map guys. Amazing attention to detail and tons of variety. I did not come across any gamebreaking bugs but i noticed that if you're crouched and even so much as click Shift to sprint the character Dolphin Dives.
Also can you please Elaborate about the Script Optimization and how much...

I'll send you a message but I guess I'll name it Req_Beta