I’m trying to follow the 5.4 motion design course. In their viewport they have the alpha checkerboard grid up all the time.
But in mine it appears to always be black, even when I change the settings in the viewport options, When I move the slider you see the change, but when i click away it goes completely black.
I think this is also effecting the lighting in my scene. When ever I click something like the Viewport/Render eyes it flashes the alpha grid aswell.
I tried reproducing your issue in a Blank project and when changing the Alpha it gives a warning that you need to have a specific setting enabled. I have clicked on ‘yes’, and restarted the editor and… nothing.
It seems that warning message does not seem to correctly apply the setting. So I had to manually set it and it started working.
The setting is Enable alpha channel support in post processing (experimental) and you need to set it to Allow through Tonemapper
