1. water and entities are invisable
2. select box is invisable with custom selection box
   Note: built-in shader not turn off
   Minecraft 1.16.2, optifanric 1.9.6 optifine 1.16.2 hd g5 (mod jar)
   also, use another shader will only render black screen with gui
   

what if use other shaders:

ok mod problem not optifine