Okay I don't know if shaders are supported natively for Forge yet. I heard a Forge port is in the works, no idea if that has been released. Need somebody from the Iris team to help. Sorry for that.
I see that you have Oculus, an unofficial Forge port of Sodium. As a performance mod, it may does its job. However, shaders is probably out of the question if it can't load shaders.
Sodium and Iris are coming to NeoForge in the future but if Forge compatibility is deemed to be too much trouble that won’t happen and it will be NeoForge only
The Thanos Method (more accurately known as a binary split) is a debugging technique used to find the mod or mods that are causing the issues you are experiencing. How does it work?
The Thanos Method is simple. To find the conflicting mods, split your mods folder into 2 groups. Remove one group, and test in-game. Keep the group that has the problem, and repeat until no more mods can be removed without the issue disappearing. Thanks to The Thanos Method, you can now enjoy an issue free modded Minecraft! https://cdn.discordapp.com/attachments/731716903742996531/873271100602220584/2951.1490520804.gif