Lighting bugs (again again again)

Mojang please fix the lighting problems! I given this problem like 4 times and still it is not fixed in 20w20b. Here is all the screenshot of all the lighting glitches that I have. The main problem is that the lighting is NOT smooth at all even if I set the graphics to fancy.

 

Mojang please fix the lighting problems! Mojang please fix the lighting problems! Mojang please fix the lighting problems! Mojang please fix the lighting problems! Mojang please fix the lighting problems! Mojang please fix the lighting problems!