Shader is not used even when installed.
Comments 2
The Render Dragon engine currently does not support third-party shaders. If you would like to see support for third-party shaders, please add a vote to this thread on the feedback site:
https://feedback.minecraft.net/hc/en-us/community/posts/360077420452-3rd-party-shader-support-for-render-dragon
Shaders that are built on HAL no longer work because recently Mojang switched render engines, this causes most shaders to not work. This is a side effect from this change.