Shader issues on ATM10 - Sunlight through blocks & Glowing ores not working

I really need help with a shader issue. Inside structures or caves the sunlight bleeds through and completely ignores blocks. Glowing ores are turned on and don't work as well. Options screen also looks different compared to other people's with the same pack.

iris-neoforge-1.8.1+mc1.21.1

unsure of what other details required please let me know if there's any other information needed.