If you are using mods, just find and replace lines in render_settings = { } or copy and paste mod_manager_settings = { } and mods_settings = { }

This one has the most visual effects enabled with a 40-45 average fps in hordes, worse in some maps(desert).

Disabled most visual effects except particle effects to avoid invisible flames on the ground.

Visual effects like bloom, lens flare, light shaft have no apparent performance impact you can enable them if you like.

The lighting is bad, doesn't look good.