Dmitriy Yukhanov on X: "Did you know? Since Unity 2018.2, Canvas Renderer has a tiny but super helpful toggle: Cull Transparent Mesh! It does culls geometry of your transparent UI objects (e.g.
Unity】UGUI中Cull Transprent Mesh作用| 菲特茶的程式筆記
How to set a material transparent for a scene but not for mesh with this material assigned - problem of culling polygons behind - Rendering - Epic Developer Community Forums