Useful to finetune a
Blend perfectly the walls colors with the virtual surrounding.
, it use the angle between a Stage display and a Camera to smooth a layer or a modifier.
Keep in mind that the selected display on which you will base your display angle mask can be different of the targeted display of the modifier or layer.
For example: If you are trying to reduce the light incidence on a Led screen, it can be interresting to apply a modifier that reduce the light on the other(s) screen(s) instead of working directly on the impacted one and applying a display angle mask relatively to the impacted one.