Lower render distance to 8-12 chunks. Also, turn off "Smooth Lighting" to max and reduce "Shadow Quality" in your shader settings.
The pack is built for Lab PBR 1.3+ shaders (like SEUS PTGI or Kappa). This allows surfaces to reflect light in real-time based on their material, making metal shine and wet stone glisten. patrix-1.16-128x-basic.zip
You can use a Debug Stick on fences or walls to turn them into decorative items like small coins, pots, or logs. Lower render distance to 8-12 chunks