You can use shaders that were made for other versions. Just need Optifine for 1.18. SEUS PTGI shaders is the best shaders I've seen so far. It has RTX support but you need to become a patreon to get it.
https://www.patreon.com/sonicether
Minecraft
The best shader
Submitted by Pasmoi, 11-12-2021, 09:12 PM, Thread ID: 228223
Thread Closed
RE: The best shader 12-12-2021, 06:08 AM #3
12-12-2021, 06:08 AM
#3