Hi. When I activate the battle mode from the Epic Fight mod, any armor becomes translucent. I do not use mods to improve the third person view like Shoulder Surfing. I also disabled TRANSLUCENT_ENTITIES in the shader settings. The problem can be solved by disabling Compute Shader in the Epic Fight settings, but then the performance will be significantly worse.

sorry for late response, i do not know how i could solve this...
does this happen with other shaders? such as photon, nostalgia, kappa? maybe even complementary?

no, this doesn't happen with other shaders. i also said in discord that it's related to this commit 539de82 ,this only happens with activated resource packs (any) or if you reload the resource packs (without activated resource packs)