I want my scene to "fade in" from black when it starts up in the BGE. For that reason I have created a plane (with shadeless, diffuse black material) in front of the camera that I want to make transparent by decreasing the alpha value.
(I connected a Python script to an Always sensor so I have a function that is called every frame; from there I set the alpha.)
However, setting the alpha does not have any effect.
plane = bge.logic.getCurrentScene().objects["blackScreen"] plane.meshes.materials.alpha = 0.0 # just an example
The plane will always be rendered in the color (including alpha!) that was set in Blender.
Why does it not work?